#CiscoLive
Cisco Webex Calling Design
and Deployment
Johannes Krohn, Principal Technical Marketing Engineer
DGTL-BRKCOL-2792
#CiscoLive
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
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3
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
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4
Overview
The Cisco Webex Calling Platform
Customer 1
Webex Calling Endpoints
Customer 2
Access
Network
Cisco Webex Calling
Webex Calling Endpoints
•
•
•
•
Fully-featured cloud PBX powered by proven technology
Deployed in Geo-redundant Cisco Data Centers
Partner sells the service, owns customer relationship
Cisco owns and supports platform and service, can bring opportunities
#CiscoLive
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6
Webex® Calling Global Availability
63
supported markets around the globe –
Commercially governed
in one of 5 supported
currencies
84
by end of Q2 CY2020
Customer UX/UI
provided in any one of
7 languages
#CiscoLive
DGTL-BRKCOL-2792
Partner support services
provided in any one of
6 languages
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7
Webex Calling Architecture
Regions and Datacenters
Regional Data Center Locations
Webex Calling operates four regional
platforms:
North America, EMEAR, APJC(Japan)
and APJC(Australia).
London
Chicago
New York
Los Angeles
Each region contains localizations for all
supported countries. This ensures that
from a single location, the Partner can
provide services globally to their
Enterprise Customers.
Frankfurt
Osaka
Tokyo
Dallas
Melbourne
#CiscoLive
Sydney
DGTL-BRKCOL-2792
Data and traffic are stored and
processed within the regional platform.
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8
Cisco MPP portfolio
Basic
Cisco® IP Phone 6800
Series
Conference
Cisco IP Conference Phone
7832 and 8832
Cisco IP Phone 7800
Series
Advanced
Video
Cisco IP Phone 8800
Series
Cisco 88x5 Series
Video Phone
Accessories
Key Expansion Modules
Headsets
MPP 6800 DECT
Telephony adapters
Cisco ATA 190 series
Basic product line
Conference room
Advanced product line
#CiscoLive
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Video
Accessories
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9
Roadmap
More features
Soft Clients
OR
Webex Teams with
Integrated Calling
Standalone Cisco Webex
Calling app
#CiscoLive
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10
Calling Behavior
•
Can be set at organization and user
level
•
External apps register protocol handlers:
•
Webex Calling app à webexcalltel: URI
•
Jabber à ciscotel: URI
•
3rd party app à tel: URI
•
Webex Teams app initiates cross-launch if required
•
Relevant options for Webex Calling:
•
Calling in Webex Teams (recommended)
•
Webex Calling app
https://help.webex.com/en-us/n1bli0k/Set-Up-Cisco-Webex-Teams-Calling-Behavior
#CiscoLive
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11
Webex Calling: PSTN quick facts
Cisco never supplies the PSTN
PSTN required for all off-net calling and between enterprises
PSTN dial plan supports the E.164 format
Emergency calls and lawful intercept are the responsibility of the PSTN provider
#CiscoLive
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12
PSTN options for every customer type
Bundled options
through SPs
Brand name telco providers
worldwide
Cloud Connected
PSTN Partners*
Keep your existing carrier
and contract
Cloud Connected PSTN
options (aka PMP)
Local gateway
*
CCP partners
IntelePeer (US, CA)
NTT (NA, LATAM, EU)
MNF (AU, NZ)
Tata (EU, US)
#CiscoLive
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13
Webex Calling PSTN: Cloud Connected
PSTN
provider X
PSTN
provider Y
Customer site
Peering
network
Access
network
Endpoints
•
PSTN access through peering with a selection of Cloud Connected partners integrated into the Cisco Webex®
Calling cloud
•
Partner helps enterprise procure and provision PSTN
•
Available to service providers who serve customers with locations outside of their PSTN footprint
#CiscoLive
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14
Webex Calling PSTN option:
Local Gateway PSTN through customer premises
PSTN
Local
Gateway
Customer 1
Access
network
Webex® endpoints
•
PSTN access through a Local Gateway device at the customer site and the customer’s PSTN
service
(SIP Trunk, PRI, etc.)
•
PSTN service decoupled from Cisco® Webex Calling service
#CiscoLive
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15
PSTN Options - Comparison
Cloud Connected PSTN
Local Gateway
No invest in on-premises GW
re-use of existing PSTN
no maintenance for on-premises
GW
inter-connect with PBX
No PSTN media hair-pinning (see
later)
PSTN interconnect in markets not supported by
Cloud Connected PSTN provider
#CiscoLive
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16
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
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17
Provisioning
User Provisioning
Foundation: Common Identity
•
Concept of “Common Identity”: same identity within the enterprise
and for cloud services
•
Synchronization of enterprise and cloud identity
•
Benefits:
•
•
•
User Experience: users can use same identity (and credentials w/ SSO)
for authentication
Operational Efficiency: minimized management overhead
Foundation for: Webex Meetings, Webex Messaging, ...
#CiscoLive
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20
User Provisioning for Cloud Services
•
Enterprises typically maintain user information in an enterprise
directory
•
Cisco Webex maintains common identity storage for user
information for all cloud services
•
Requirements:
•
Consistent user information in enterprise directory and cloud identity
storage
avoid additional maintenance effort for system administrator
•
Automatic create, update, and delete of users
•
•
Solution: Hybrid Directory Service
#CiscoLive
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21
Directory Connector Overview
ADSI COM
Libs
Active
Directory
REST
Directory
Connector
•
Directory connector retrieves user information from AD and syncs
information to identity store in Webex
•
Cloud access using REST based APIs
•
Sync is based on sync agreement (base, filter attribute mappings)
•
Directory connector is installed on server in Windows domain w/
admin privileges
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22
“Claimed” and “Verified” Domains
•
Control hub allows to
“claim” and “verify”
domains
example.com
example.org
•
Domains can be verified
via Control Hub
(DNS validation via TXT record)
•
Domain claim requires domain verification1st
https://help.webex.com/en-us/nxz79m5/Add-Verify-and-Claim-Domains
#CiscoLive
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26
”Claimed” and “Verified” Domains
•
Verified domain
•
•
•
Users w/ email addresses from verified domains can be converted to
licensed users from consumer organization
To avoid “pending” user’s domain (at least) needs to be verified
Claimed domain
•
New users with email addresses w/ that domain can only be added to
organization for which the domain has been claimed
Users existing before claim are not affected
•
Automatic user activation requires claimed domain (and SSO)
•
https://help.webex.com/en-us/n6jxw9e/Claim-Users-to-Your-Organization-Convert-Users
https://help.webex.com/en-us/e4ektc/Disable-Delayed-Claim-for-Your-Organization
#CiscoLive
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27
“Claimed” vs “Verified”
Verified Domain
Claimed Domain
Process
Control Hub, DNS based validation
(TXT record)
Verify 1st, then open TAC case
Exclusive
Domain users can exist in and can
be added to other organizations
Domain users can not be added to
other organizations
Domain users existing prior to claim
are not affected
Sideboarding
Domain users can be sideboarded
into consumer organization
w/o Directory Connector: into
customer organization
w/ Directory Connector: no
sideboarding!
Conversion
Domain users can be converted from consumer organization
Delayed conversion if email domain is not verified nor claimed
Directory Connector
Can add users from domain
#CiscoLive
Can add users from domain
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28
Assigning Licenses
•
“Auto-Assign Template” in
Control Hub determines the
licenses assigned to users
added via Directory Connector
•
Alternative:
•
bulk update users via CSV update
•
Update services for single users
Webex Calling entitlement cannot
be set via Auto-Assign Template
#CiscoLive
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29
“Auto-Assign Template”
•
Pro: New users are automatically enabled for services
•
Con: Licenses required for all users synced by Directory Connector
•
Alternative 1: selective sync of users (for example based on AD group
membership)
•
•
Pro: users added to group in AD are automatically enabled for services
•
Con: incomplete user search; No sideboarding!
Alternative 2: full sync of all users & manual license assignment (CSV, ...)
•
Pro: New users automatically get licenses according to Auto-Assign Template
•
Con: initial (full) sync might lead to license starvation; can be avoided by doing the
initial full sync w/ an empty Auto-Assign Template
•
Continuous license management required if not enough licenses for all users
#CiscoLive
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30
Single Sign-On
•
Directory Connector only syncs user data
•
On-premises vs. cloud authentication
•
Issues:
•
•
•
•
Bad user experience: maintain multiple credentials
Security: multi-factor authentication, account lock-out, other policies, etc.
All new users receive email invitation; can only be turned off with SSO
enabled
SSO is the solution
•
Webex authentication linked back to enterprise
#CiscoLive
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31
SSO Architecture
•
HTTPS
(Proxy)
ra
ti o
n
nt
IdP
gi
st
he
t
HTTPS
Re
t
Au
u
/A
ion
t
ica
n
ti o
iz a
r
ho
IdP
With SSO enabled Webex Teams application during registration gets redirected to IdP
configured for Webex Organization
•
form based SAML 2.0 REDIRECT/POST authorization code authorization flow
•
Redirection to IdP instance (actually a HTTPS reverse proxy) in the customer’s DMZ
•
IdP handles authentication/authorization with AD backend
#CiscoLive
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32
Single Sign On (SSO)
•
Required building block for best user experience
•
SAML 2.0 based (SP initiated form based REDIRECT/POST authorization code
authorization flow)
•
Validated configuration guides for:
•
Active Directory Federation Services (ADFS) 2.0 and 3.0
•
F5 Big-IOP
•
Google Apps
•
Microsoft Azure
•
OKTA
•
PingFederate
•
Shibboleth
•
SimpleSAML
https://collaborationhelp.cisco.com/article/en-us/lfu88u
#CiscoLive
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33
Validation (Invite) Emails
•
New users receive validation email
•
Validate user activation
•
Initial password
•
User details
•
Validation of user activation not required if domain is associated with given
organization (domain is verified)
•
Password setting not required with SSO
•
User details not required with Directory Connector
•
Directory Connector + SSO + “Suppress Admin Invite Emails”
à new users automatically activated w/o user intervention
#CiscoLive
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34
Recommended Deployment Steps
Verify Domain(s); administrator domain 1st!
Convert existing users from other organizations (including consumer)
can only be done w/o directory sync enabled
Claim Domain(s)
Set up SSO
“Suppress Admin Invite Emails”
1.
2.
3.
4.
5.
Set up Directory Connector
7. Decide on license assignment policy (Auto-Assign Template or CSV)
8. Test run
6.
9.
•
Do all converted users exist in Active Directory?
•
Check for other sync anomalies (especially mismatched users)
Full sync
#CiscoLive
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35
Bulk User Operations
•
Add users if Directory Connector is not used
•
Update users
•
Synced from directory
•
Manually provisioned
•
Bulk provisioned
•
Enable users for Webex Calling
•
Assign user to location
•
Assign DN (and DID) to user
•
Define calling behavior
#CiscoLive
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36
Bulk User Operations
•
Add users if Directory Connector is not used
•
Update users
•
Synced from directory
•
Manually provisioned
•
Bulk provisioned
•
Enable users for Webex Calling
•
Assign user to location
•
Assign DN (and DID) to user
•
Define calling behavior
#CiscoLive
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37
CSV File for Bulk User Operations
•
Relevant Columns:
•
Directory Number - DN
•
Direct Line - DID
•
Location - location
•
Calling Behavior – user level calling behavior setting
•
Webex Calling VAR Enterprise – Enable for Webex
Calling (TRUE / FALSE)
#CiscoLive
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38
CSV File for Bulk User Operations
•
•
Relevant Columns:
•
Directory Number - DN
•
Direct Line - DID
•
Location - location
•
Calling Behavior – user level calling behavior setting
•
Webex Calling VAR Enterprise – Enable for Webex Calling
Calling Behavior options
USE_ORG_SETTINGS
Organization Setting
NATIVE_WEBEX_TEAMS_CALLING
Calling In Webex Teams
NATIVE_SIP_CALL_TO_UCM
Calling in Webex Teams (Unified CM)
CALL_WITH_APP_REGISTERED_FOR_WEBEXCALLTEL
Webex Calling app
CALL_WITH_APP_REGISTERED_FOR_CISCOTEL
Cisco Jabber app
CALL_WITH_APP_REGISTERED_FOR_TEL
Third-Party app
#CiscoLive
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39
User Provisioning Using APIs
•
Currently no APIs for location management
•
Webex Teams People API allows to provision users and to assign licenses
(with the exception of Webex Calling entitlements)
•
No support for DN, DID, location, calling behavior
#CiscoLive
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40
User Provisioning -Summary
•
Directory Connector
•
•
•
•
•
Bulk (or per user) operations still required for
•
DN
DID
•
Location
•
•
Automatic user provisioning
Linked to enterprise directory
Foundation for all Webex services (Messaging, Meeting, Calling)
Prerequisite for SSO, … and “email less” user onboarding
Limited provisioning API support (people API)
#CiscoLive
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41
Phone Provisioning
Provisioning a Phone
•
New phones are provisioned in Control Hub
•
By activation code, by MAC address
•
For a user or associated with a place
•
Activation codes can be sent via email
•
Devices set up via activation code show in Control
Hub only after activation
•
Activation codes have limited lifetime
•
Activation code onboarding supported for
•
6821, 6841, 6851
•
7811, 7821, 7832, 7841, 7861
•
8811, 8832, 8841, 8851, 8861, 8845, 8865
•
Minimum release 11-2-3MSR1-1
https://help.webex.com/en-us/n9r1aac/Configure-and-Manage-Webex-Calling-Devices#id_118912
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43
Phone Bulk Provisioning
•
Bulk provisioning based on CSV file upload
Username
Reference to existing user or name of place
Type
USER or PLACE
Directory Number
Has to be empty for type USER
Direct Line
Has to be empty for type USER
Device Type
IP, WEBEX_CALLING, or WEBEX
Model
Only required for device type IP or WEBEX_CALLING
MAC Address
For device type IP and WEBEX_CALLING, activation code onboarding if empty
Location
Webex Calling location
#CiscoLive
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44
Bulk Provisioning with Activation Codes
•
Activation codes can be downloaded as CSV or emailed to the device owner
(not for places)
•
CSV download after completion of bulk transaction
•
CSV contains activation codes together w/ device information
•
Devices show up in Control Hub after activation
#CiscoLive
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45
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
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46
Design Considerations
Media Flow /
Bandwidth
Codec Selection
•
Webex Calling codec preference: G.722, G.729, G.711u, G.711a
•
Unified CM codec preference: G.722, G.711u, G.711a, G.729
•
UCM prefers G.711 over G.729
•
Webex Calling prefers G.729 over G.711
•
Leads to asymmetric codec negotiation based in offer/answer model
•
Call from Unified CM: Webex Calling picks G.729
•
Call from Webex Calling: Unified CM picks G.711
•
Solution: don’t offer G.729 to Webex Calling; configuration on CUBE
•
Bandwidth: 87.2 kbps (G.711, G.722) or 31.2 kpbs
… full-duplex per call leg!
https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/7934-bwidth-consume.html
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49
Media Flow
•
•
All media flows are always anchored on Webex Calling access SBCs
•
Between Webex Calling endpoints
•
Between Local Gateway and Webex Calling endpoints
Needs to be factored into bandwidth requirements
calculation
•
2 x 87.2kbps full-duplex per G.711 intra-site call
•
No hair-pinning of PSTN calls when using
Cloud Connected PSTN (CCP)
•
Media path optimization based on
conditional media release (ICE): roadmap
#CiscoLive
2x
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50
Inter-Customer Media Flow
•
Inter-customer calls always go
via the PSTN
•
Hair-pinning happens for call-legs
within each customer
Cisco
Webex Calling
Internet
2x
2x
PSTN
PSTN
Customer B Location
Local
Gateway
Customer A Location
Local
Gateway
Webex Calling Endpoints
#CiscoLive
Webex Calling Endpoints
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52
Multi-Region Customer
US
•
Customers are tied to one
region
•
All registrations to that
region
•
Media anchored on
access SBCs of “home”
region
•
AU
Global Webex Backbone
Internet
Potentially negative impact:
•
•
Cut-through delay
Media RTT impact
SIP Registration
Webex Calling Endpoints
SRTP Media
Location 1
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Webex Calling Endpoints
Location 2
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53
Multi-Region Customer: Regional Media
•
Access SBC presence in
other regions
•
In-region registration
•
In-region media
•
Signaling still inter-region
•
Cut-through delay might
still occur
•
Media RTT not a factor
US
US
AU
AU
Global Webex Backbone
US
AU
Internet
SIP Registration
Webex Calling Endpoints
SIP Signaling
SRTP Media
Location 1
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Webex Calling Endpoints
Location 2
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54
Local Gateway
CUBE as local gateway
Architecture overview
Control Hub portal
Partner defines local
GW for a customer site;
connection parameters
generated
Local GW registers
over SIP TLS using
conn. parameters from
Control Hub
PSTN
Provisioning layer
Load
balancers
Customer
site
Register
Network
functions
Call control
Access network
Access SBC
Local gateway
Webex® endpoints
Peering SBC
Webex Calling routes calls to ‘unknown’
destinations from that customer site to the
configured local GW
#CiscoLive
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56
CUBE as local gateway
Firewall and NAT traversal
Customer site
Customer
firewall
Pinholes for outbound traffic
(return traffic uses same flow)
SIP/TLS
Local gateway
(CUBE/IOS GW)
sRTP/U
DP
Internet
Webex® endpoints
•
•
•
In most cases, the local gateway and endpoints can sit on the internal customer network using private
IP addresses (with NAT and PAT)
Firewall needs to allow outbound traffic (SIP, RTP/UDP, HTTP) to specific IP addresses/ports (see
updated Webex® Calling firewall and network configuration guide)
Media Latching to establish downstream media path
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57
Local Gateway
Platform Support
Local Gateway (LGW)
•
Cisco CUBE (for IP-based connectivity) or
Cisco IOS Gateway (for TDM-based connectivity)
•
Hardware and software requirements:
•
ISR 4321, 4331, 4351, 4431, 4451 (IOS XE 16.9(4)
and 16.12.2 or later)
•
IOS-XE 16.10.x is not supported as Local Gateway for any
platform
•
CSR 1000v (vCUBE) (IOS XE 16.9(4) and 16.12.2 or later)
ISR 1100 (IOS-XE 16.12.2 or later)
•
•
CUBE
IOS-XE GW
CUBE calling licenses included in Webex
Calling Flex License
Note: platform requirements driven by encryption/decryption needs
(signaling/media to Webex Calling is always secure)
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58
Local Gateway
Feature Support and Platform Sizing
•
•
•
Standard CUBE feature support (no need
for dedicated hardware)
Numbers in the table assume dedicated
Local GW and reflect CUBE platform
capacities only. Consult Webex Calling
documentation for overall Webex Calling
capacity guidance
Standard platform sizing using sRTP-RTP
concurrent session numbers (based on IOS-XE
16.9(4)/16.12.1c). CSR1000v based on 16.9.3
•
Number of corresponding users depends
on BHCA etc.
#CiscoLive
Platform
sRTP-RTP
Sessions
Sustainable CPS
ISR1100
300
2
ISR4321
300
1
ISR4331
600
3
ISR4351
750
4
ISR4431
750
4
ISR4451
2100
11
ISR4461 (IOS-XE 17.2.1.r)
9900
55
CSR1000V (1 vCPU)
300
1
CSR1000v (2 vCPU)
1000
6
CSR1000V (4 vCPU)
1080
6
DGTL-BRKCOL-2792
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59
Webex Calling PSTN option:
Partner hosted Local Gateway
PSTN
provider Y
Virtualized
local GWs
Customer 1’s
SIP trunk
PSTN
provider Z
Customer 2’s
SIP trunk
Partner X’s data center
Internet
• Partner hosts and manages customer’s local
Customer 1
gateway (e.g., vCUBE) in partner’s data center;
connected OTT to Webex cloud
Customer 2
• Not an option if on-premises PBX or SBC is
Webex® endpoints
present (requires a VPN between the partner’s
data center and customer network)
Webex endpoints
#CiscoLive
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60
Webex Calling PSTN option:
Partner hosted Local Gateway
PSTN
provider Y
Virtualized
local GWs
Customer 1’s
SIP trunk
PSTN
provider Z
Customer 2’s
SIP trunk
Partner X’s data center
No IP connectivity
required!
Customer 1
Internet
• Partner hosts and manages customer’s local
gateway (e.g., vCUBE) in partner’s data center;
connected OTT to Webex cloud
Customer 2
• Not an option if on-premises PBX or SBC is
Webex® endpoints
present (requires a VPN between the partner’s
data center and customer network)
Webex endpoints
#CiscoLive
DGTL-BRKCOL-2792
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61
Partner Hosted LGW
•
Can run on any supported CUBE platform
•
Single (v)CUBE instance for multiple tenants
•
•
Stacking of dial-peer configuration
•
•
Tenant specific dial-peers
From Webex Calling
•
•
Virtualized
local GWs
No overlays required (VRFs, …)
voice class URI 2xx sip matching on tenant specific DTG obtained from Control Hub
From PSTN
•
voice lass URI 1xx sip matching on SIP trunk peer address
•
.. or matching on called number, if the SIP trunk is shared
#CiscoLive
DGTL-BRKCOL-2792
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62
Local Gateway call routing to dedicated PSTN
GW/SBC or IP PSTN
Local Gateway
Cisco Webex Calling
Existing SBC /
PSTN GW
IP PSTN
voice class uri 200 sip
pattern dtg=hussain2572.lgu
voice class uri 100 sip
host <pstn ip address>
! pattern uniquely identifies a Local gateway site within an
! Enterprise Trunk Group OTG/DTG from Control Hub
! Or existing SBC / PSTN GW
dial-peer voice 200 voip
dial-peer voice 100 voip
description Incoming dial-peer from Webex Calling
description Incoming dial-peer from IP PSTN
incoming uri request 200
destination dpg 100
incoming uri via 100
destination dpg 200
voice class dpg 100
voice class dpg 200
description Incoming WxC(DP200) to IP PSTN(DP101)
description Incoming IP PSTN(DP100) to WxC(DP201)
dial-peer 101 preference 1
dial-peer 201 preference 1
dial-peer voice 101 voip
description Outgoing dial-peer to IP PSTN
destination-pattern BAD.BAD
session target ipv4: <pstn ip address>
#CiscoLive
dial-peer voice 201 voip
description Outgoing dial-peer to Webex Calling
destination-pattern BAD.BAD
session target sip-server
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
63
Webex Calling Local Gateway Capacities
•
Webex Calling access SBCs limits the number of concurrent calls
to 150 per physical Local Gateway (independent of # of provisioned
tenants)
•
•
Webex Calling platform limits the number of concurrent calls to 150
per Local Gateway provisioned in Control Hub (per ID/DTG)
•
•
Currently in the process of being lifted to 500 (already done in US)
Currently in the process of being lifted to 450
Limits can be increased
•
150 calls max
TAC request required
#CiscoLive
DGTL-BRKCOL-2792
150 calls max
150 calls max
150 calls max
150 calls max
150 calls max
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
64
Call Routing
Call routing
Single Cloud Connected PSTN Provider
PSTN
Provider
Webex® Calling sends calls
that do not match the
customer’s Webex Calling
destinations to the Cloud
Connected PSTN Provider
Webex Cloud
Peering
Network
Internet
Customer A
Webex endpoints
#CiscoLive
DGTL-BRKCOL-2792
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66
Call routing
Single local gateway
Local gateway routes calls
coming from Webex Calling
to the PSTN (and vice versa)
Internet
Webex® Calling sends calls that
do not match the customer’s
Webex Calling destinations to
the local gateway
PSTN
PSTN gateway
may be dedicated
or
co-resident with
the local gateway
Customer A
(Existing
PSTN GW)
Local
gateway
Webex endpoints
#CiscoLive
DGTL-BRKCOL-2792
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67
Call routing
Multiple local gateways
Control Hub
configuration
Loc 1
Loc 2
LGW-B
Loc 3
Internet
PSTN
Location 1
Multiple locations can use the
same local GW
LGW-A
One (and only one) local GW
must be assigned to each location
PSTN
Widgets, Inc.
Location 2
Location 3
LGW-A
LGW-B
#CiscoLive
DGTL-BRKCOL-2792
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68
Webex Calling Dial
Plan
Webex Calling dialing habits
•
Extension dialing: 2-6 digits (default 4)
•
Intra- and Inter-site; inter-site requires unique extensions
•
Optional location code: up to 15 digits
•
+E.164
•
US, Canada, Puerto Rico:
•
•
National: 10 digit dialing
•
National: 1+10 digit dialing
•
7 digit dialing:
•
normalization to E.164 assuming NPA of originator
•
Dial plans in phones not optimized for 7D dialing à timeout experienced when using off-hook dialing
•
Avoid conflict between abbreviated inter-site dialing (enterprise numbers) and 7D when integrating with PBX via Local
Gateway; no 7D enterprise numbers
Other countries
•
Various digit lengths based on published national numbering plan*
*
#CiscoLive
https://www.itu.int/oth/T0202.aspx?parent=T0202
DGTL-BRKCOL-2792
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70
Understanding location codes
•
What if extension ranges of sites overlap?
•
No extension dialing between sites
•
Alice can call Bob and Charlie using extension dialing
•
Alice cannot call Dave using extension dialing
•
What if Charlie dials 4002?
Widgets, Inc.
Alice
4001
+13105554001
LA
NY
Bob
Charlie
4002
+13105554002
6001
+12125556001
#CiscoLive
Montreal
Dave
4002
+15145554002
DGTL-BRKCOL-2792
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71
Understanding location codes
•
Solution: add location codes
•
•
•
•
•
Need to be unique!
Inter-site dialing using location code + extension
Location code + extension is unique
Avoid 7D enterprise numbers (7D dialing normalisation in the US!)
Alice can call Dave (and the other users) using inter-site dialing
Location
Location Code
LA
8201
NY
8202
Montreal
8251
Widgets, Inc.
Alice
4001
82014001
+13105554001
LA
NY
Bob
Charlie
4002
82014002
+13105554002
#CiscoLive
6001
82026001
+12125556001
DGTL-BRKCOL-2792
Montreal
Dave
4002
82514002
+15145554002
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72
Enterprise Best Practices
•
Goal: optimize dial plan handling in phones to minimize timeouts
1.
•
2.
•
Per location
Internal steering digit for inter-site (for example 8)
Different from PSTN
3.
Uniform location code length (for example 4)
•
Location code includes leading internal steering digit!
4.
•
Outbound dialing digit (for example 9)
Uniform extension length (for example 4)
Uniform inter-site dialing: steering digit – location id – extension
•
Example: 8-496-9764
#CiscoLive
DGTL-BRKCOL-2792
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73
Enterprise Best Practices
•
Goal: optimize dial plan handling in phones to minimize timeouts
1.
•
2.
•
Per location
Internal steering digit for inter-site (for example 8)
Different from PSTN
3.
Uniform location code length (for example 4)
•
Location code includes leading internal steering digit!
4.
•
Outbound dialing digit (for example 9)
Uniform extension length (for example 4)
Uniform inter-site dialing: steering digit – location id – extension
•
Example: 8-496-9764
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
74
Enterprise Best Practices
•
Goal: optimize dial plan handling in phones to minimize timeouts
1.
•
2.
•
Per location
Internal steering digit for inter-site (for example 8)
Different from PSTN
3.
Uniform location code length (for example 4)
•
Location code includes leading internal steering digit!
4.
•
Outbound dialing digit (for example 9)
Uniform extension length (for example 4)
Uniform inter-site dialing: steering digit – location id – extension
•
Example: 8-496-9764
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
75
Conflicts
•
To avoid timeouts conflicts need to be avoided between:
•
First digit of extensions
•
Internal steering digit
•
Outbound dial digit
•
Example: steering digit 8, 4D extensions, 4D location code
•
What if Alice lifts the handset and starts to dials 8, 2, 0, 2? Bob, Charlie?
Location
Location Code
LA
8201
NY
8202
Montreal
8251
Widgets, Inc.
Alice
8001
82018001
+13105558001
LA
NY
Bob
Charlie
8202
82018202
+13105558202
#CiscoLive
6001
82026001
+12125556001
DGTL-BRKCOL-2792
Montreal
Dave
4001
82514001
+15145554001
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
76
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
77
Integration with
Unified CM
Unified CM with Dedicated PSTN GW
•
Webex Calling routes all calls
for non-Webex Calling
destinations to Local GW
•
Internet
PSTN
Enterprise
Site 1
Existing
SBC /
PSTN GW
Site 2
CUCM
LGW
Includes PSTN destinations and
IP PBX internal extensions
•
Local GW routes all calls to
Unified CM
•
Unified CM routes calls to
locally-registered phones or
to the PSTN via an existing
SBC/GW
Webex Calling Endpoints
#CiscoLive
DGTL-BRKCOL-2792
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79
Unified CM with Co-Located PSTN GW and LGW
•
Webex Calling routes all calls
to non-Webex Calling
destinations to Local GW
•
Internet
PSTN
•
Local GW routes all calls to
Unified CM
•
Unified CM routes calls to
locally-registered phones or
to the PSTN back via the
Local GW
Enterprise
Site 1
Site 2
CUCM
SBC and LGW
Webex Calling Endpoints
#CiscoLive
Includes PSTN calls and on-net
calls towards Unified CM internal
extensions
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
80
CoS for Calls from CUBE (Combined LGW and PSTN)
Calls from Webex Calling
•
Calls coming into Unified CM
through CUBE from Webex
Calling need access to:
•
PSTN
•
On-premises destinations (local
and remote)
Internet
PSTN
Enterprise
Site 1
Site 2
•
No access to Webex Calling
•
Supported dialing habits:
•
•
CUCM
SBC and LGW
+E.164
Enterprise abbreviated
Webex Calling Endpoints
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
81
CoS for Calls from CUBE (Combined LGW and PSTN)
Calls from PSTN
•
Internet
PSTN
Enterprise
Site 1
Site 2
CUCM
SBC and LGW
Webex Calling Endpoints
#CiscoLive
Calls coming into Unified CM
through CUBE from PSTN need
access to:
•
Webex Calling
•
On-premises destinations (local
and remote)
•
No access to PSTN!
•
Different classes of services for
calls coming in through same
CUBE but different initial source
à need to have two incoming
trunks on UCM to be able to
differentiate between call types
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
82
CoS for Calls from CUBE (Combined LGW and PSTN)
Internet
PSTN
•
UCM has two SIP trunks
(different listening ports on
UCM) with CUBE
•
Differentiated CoS based on
trunks’ incoming CSS
•
CUBE selects trunk based on
source
Enterprise
Site 1
Site 2
PST
N
CUCM
Web
•
ex
SBC and LGW
Webex Calling Endpoints
#CiscoLive
•
From Webex
•
From PSTN
VIA header allows trunk
identification inbound on
CUBE
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
83
Local Gateway Number Format
•
Called/Calling Party Information on the link between Webex Calling and Unified CM
•
Called Party To Webex Calling:
•
•
+E.164
•
DN: needs to be unique, no overlapping DN ranges between locations!
•
ESN
Calling Party to Webex Calling:
•
•
•
Anything goes J; want to make sure that it is either +E.164 or a dialing habit supported on Webex Calling (callback)
Called Party from Webex Calling:
•
Identified national dialing habits get normalized to +E.164 (for example 91-10D -> +1-10D)
•
Unknown destinations: sent as dialed; Unified CM dial plan needs to support that dialing habit
Calling Party from Webex Calling:
•
+E.164 (Location’s main number if user has no DID!!!)
#CiscoLive
DGTL-BRKCOL-2792
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84
Presentation ID can be set in CAP
•
Presentation ID can be set for
each user
•
CAP allows to select any of the
provisioned +E.164 DIDs
•
Default:
•
User w/ DID: user’s DID
•
User w/o DID: location’s main number
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
85
Caller ID in INVITE
•
From and P-Asserted-Identity (PAI)
•
From contains “Presentation ID”, configured caller ID, +E.164
•
For a user w/o DID From and PAI are always identical
•
For a user with DID From and PAI can be different
•
From contains user’s Presentation ID
•
PAI contains user’s +E.164 DID
User has DID
From
PAI
Yes
Presentation ID
(default: user’s DID), +E.164
user’s DID, +E.164
No
Presentation ID, +E.164
Presentation ID, +E.164
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
86
Caller ID: Example
Caller
Callee
From
PAI
Comment
Alice
Dave
+1 213 555 4001
+1 213 555 4001
Unified CM dial plan can localize caller ID based on From and
enables callback
Bob
Dave
+1 213 555 4000
+1 213 555 4000
Main number as presentation ID. Unified CM dial plan can
localize caller ID based on From, but no callback possible
Internal Dialing 8-XXX-XXXX
Location Routing Prefix Length: 4
Location Routing Steering Digit: 8
Internal Extension Length: 4
Location
Location Code
LA
8213
NY
8212
Widgets, Inc.
LA 8213
NY 8212
Main: +1 213 555 4000
Alice
Bob
4001
8 213 4001
+1 213 555 4001
4201
8 213 4201
<none>
#CiscoLive
DGTL-BRKCOL-2792
Dave
5001
8 212 5001
+1 212 555 5001
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
87
Caller ID Normalization
•
Tool: Calling Party Transformation Patterns
•
Can be done either
•
•
inbound on Trunk from Webex Calling
Outbound on Unified CM registered device
•
Best practice: globalize on ingress, localize on
egress
•
… but customer might have implemented other dial plans
•
Unified CM caller ID is always based on RPID or From (in this
priority)
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/dialplan.html
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Collaboration/enterprise/12x/120/collbcvd/control.html
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
88
Call examples
Call to on-premises PBX
Charlie calls Alice in LA by dialing:
NY
PSTN
• 82014001
• 13105554001
• +13105554001
LA-LGW
UCM rejects
unknown
numbers
Webex® Calling sends unknown digit
strings (82014001) to local GW
Internet
Widgets, Inc.
LA
NY
SF
LA-LGW
PSTN
GW
Cisco® UCM
Alice
4001
82014001
+13105554001
Bob
Charlie
5001
82025001
+14155555001
#CiscoLive
6001
87776001
+12125556001
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
89
Call examples
Call from on-premises PBX
Alice calls Charlie in NY by dialing:
NY
PSTN
Widgets, Inc.
•
•
•
•
LA-LGW
UCM
normalizes to
+E.164 before
routing to LGW
LA
+12125556001
912125556001
87776001
6001 (non-overlapping 4D inter-site)
Internet
NY
SF
LA-LGW
PSTN
GW
Cisco® UCM
Alice
4001
82014001
+13105554001
Bob
Charlie
5001
82025001
+14155555001
#CiscoLive
6001
87776001
+12125556001
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
90
Call examples
Split site calling Unified CM to Webex Calling
Alice calls Bob by dialing:
NY
PSTN
Widgets, Inc.
•
•
•
•
LA-LGW
UCM
normalizes to
+E.164 before
routing to LGW*
Internet
*Called
•
•
LA
+13105554002
913105554002
82014002
4002 (4D inter-site)
party can also be sent as:
ESN: 82014002
4D: 4002 – if 4XXX range is unique
LA-LGW
PSTN
GW
Cisco® UCM
Alice
4001
82014001
+13105554001
Bob
4002
82014002
+13105554002
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
91
Call examples
Split site calling Webex Calling to Unified CM
Bob calls Alice by dialing:
NY
PSTN
•
•
•
•
LA-LGW
UCM routing:
PSTN, local, or
reject (unknown)
Internet
Widgets, Inc.
+13105554001
913105554001
82014001
4001 (4D inter-site)
• Calling party sent by Webex Calling: +13105554002
• UCM needs to localize accordingly for display
LA
LA-LGW
PSTN
GW
Cisco® UCM
Alice
4001
82014001
+13105554001
Bob
4002
82014002
+13105554002
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
92
Call examples
Split site calling Webex Calling to Unified CM (no DID)
Bob calls Alice by dialing:
NY
PSTN
•
•
•
•
LA-LGW
UCM routing:
PSTN, local, or
reject (unknown)
+13105554001
913105554001
82014001
4001 (4D inter-site)
Internet
Widgets, Inc.
3105554800
LA
LA-LGW
PSTN
GW
Cisco® UCM
Alice
4001
82014001
+13105554001
+13105554800 (main)
Bob
4002
82014002
No DID!
#CiscoLive
• Calling party sent by Webex Calling: +13105554800
• Webex Calling sends main number of location if no
DID exists
• UCM needs to localize accordingly for display
• No callback from missed calls directory!
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
93
Unified CM Reference
Dial Plan
LGW Dial Plan Integration
•
Egress LGW selection not site specific à no LRG based LGW selection
CSSs
Partitions
Route Lists Route Groups
required
•
Single partition w/ all
Webex Calling destinations
•
NYCtoE164
Webex Calling destinations
provisioned as +E.164 route patterns
•
cannot be globalized to +E.164
•
Requires per destination abbreviated RPs
•
Only required for “split sites”
#CiscoLive
tions
Caution: abbreviated intra-site dialing
to non-DID destinations
1XX, Prefix +12125550
arti
ining P
Rema
•
DN
All IP Phone DNs (+E.164)
NYCInternational
9.[2-9]XXXXXX, Pre-Dot, Prefix +1212
Directory Number
Translation Pattern
Route Pattern
123
WebexCalling
+E.164 RPs for all
Webex Calling destinations
DGTL-BRKCOL-2792
Webex
Calling RL
Webex Calling
RG
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
95
Abbreviated Inter-site Dialing to Webex Calling
•
•
Any dialing habit can be transformed to +E.164 using dialing normalization translations
Same partition as used
for Webex Calling routes
•
CSSs
Partitions
NYCInternational
Dedicated partition to allow for diff. CoS:
calls from Webex Calling only have access to
OnNetRemote but not WebexCalling (loops!)
Route Lists
Route Groups
DN
All IP Phone DNs (+E.164)
NYCtoE164
1XX, Prefix +12125550
9.[2-9]XXXXXX, Pre-Dot, Prefix +1212
OnNetRemote
Directory Number
Translation Pattern
Route Pattern
81012.XXX, Pre-Dot,
Prefix +12125550
WebexCalling
81101.1XX, Pre-Dot,
Prefix +14085550
\+140855501XX
#CiscoLive
DGTL-BRKCOL-2792
Webex
Calling RL
Webex Calling
RG
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
96
Abbreviated Inter-site Dialing to Webex Calling
•
•
Any dialing habit can be transformed to +E.164 using dialing normalization translations
Same partition as used
for Webex Calling routes
•
•
•
CSSs
Partitions
NYCInternational
Dedicated partition to allow for diff. CoS:
calls from Webex Calling only have access to
OnNetRemote but not WebexCalling (loops!)
1XX, Prefix +12125550
.. If that doesn’t cause conflicts
(overlaps) with existing enterprise
dial plan
9.[2-9]XXXXXX, Pre-Dot, Prefix +1212
OnNetRemote
Directory Number
Translation Pattern
Route Pattern
81012.XXX, Pre-Dot,
Prefix +12125550
WebexCalling
811011XX
\+140855501XX
#CiscoLive
Route Groups
DN
All IP Phone DNs (+E.164)
NYCtoE164
Webex calling dialing habits can also
be integrated directly via route patterns to
enable calls to non-DID phones
Route Lists
DGTL-BRKCOL-2792
Webex
Calling RL
Webex Calling
RG
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
97
Agenda
•
Webex Calling Overview
•
Provisioning
•
Design Considerations
•
Integration with Unified CM
•
Closing
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
98
Closing
References
•
Get Started with Cisco Webex Calling: https://www.cisco.com/go/webexcallinghelp
•
Port Reference for Webex Calling: https://help.webex.com/en-us/b2exve/Port-Reference-forWebex-Calling
•
Release Notes for Webex Calling: https://help.webex.com/en-us/nfyffgc/Release-Notes-forCisco-Webex-Calling
•
Cloud Connected PSTN Partners: https://community.cisco.com/t5/collaboration-voice-andvideo/cloud-connected-pstn-provider-partners-for-cisco-webex-calling/ta-p/3916211
•
Webex Calling whitepaper:
https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Collaboration/hybrid/AltDesigns/PA
-WbxCall.pdf
•
Transitioning from Unified CM to Webex Calling, Deployment Guide:
https://www.cisco.com/c/dam/en/us/td/docs/solutions/PA/mcp/DEPLOYMENT_CALLING_Unifie
d_CM_to_Webex_Calling.pdf
#CiscoLive
DGTL-BRKCOL-2792
© 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public
100
Thank you
#CiscoLive
#CiscoLive