XL Hosted PBX Services
SIP Based Services by XL
XL Business Solution
2006
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL
Agenda
• Product Brief
• How it Works
• How to Connect
• How to Survive
Slide 2
Product Brief
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL
Hosted PBX Service
Own Managed PBX
Hosted PBX
PBX /
IP PBX
PBX /
IP PBX
Branch A
Hosted
PBX
PBX /
IP PBX
Branch …n
Headquarter
Headquarter
Branch ..n
Branch A
• High cost of PBX investment and
maintenance
• No PBX investment, reduce
maintenance cost
• Separated PBX System of each
office
• Integrated PBX System of the
offices (Integrated Corporate
Telecommunication System)
• High cost of internal
communication
• No Cost of internal communication
 HQ to Branch
 Free HQ to Branch call
 Branch to Branch
 Free Branch to Branch call
Slide 4
XL Hosted PBX Service
• Ability to deliver Hosted PBX service Nationwide even Worldwide
through XL MPLS Network and NNI (partner)
• More cost reduction. Reduce NOT ONLY in the number of elements to
purchase, deploy, and manage PBX but ALSO reduce usage cost by
getting the benefit of XL VoIP and XL GSM PABX Services
• Wide range of service: Convergence Service of Data (Private and
Public/Internet), Fixed and Mobile Voice
• Most interoperable system: wide range of CPE (minimize investment)
XL Hosted PBX Services
Bundling w/
XL Products
XL Broadband
Internet Services
Corporate
XL MPLS
Network
XL VoIP
XL GSM
XL Hosted
System
Slide 5
Service Features
Standard
Hosted PBX
(PABX Services)
GSM PBX
Extension Dialing
Speed Dial
Call Return
Last Number Redial
Consultation Hold
Call Transfer
Three-Way Calling
Call Waiting
Calling Line ID
Call Forwarding
Do Not Disturb
Voice Messaging
Voice Portal
Web-Based MACs
Calling Plans
Device Inventory
Series Completion
Hunt Groups
Advance PBX and Multimedia
CommPilot Call Manager
Click-to-Dial, Phone Lists,
LDAP Directory Integration
Outlook Integration
Call Screening
Priority & Distinctive Ringing, Anonymous
Call Reject, Selective Call Accept &
Reject, Call Screening by Digit Patterns
Alternate Numbers
Shared Call Appearance
Auto Attendant
Dial by Name or Extension, Record
Greeting Remotely
Attendant Console
Directory Manager, User Status
Voice Mail, VM Waiting Indication, VM to
E-Mail, VM Notification, VM Call Back
Call Park, Call Pick-Up
Account Codes
Authorization Codes
Call Intercept
Call Centers
Instant Messaging & Presence
Remote Office
Music on Hold
Find-Me Follow-Me
Selective Call Forwarding, Simultaneous
Ringing, Call Notify
Unified Messaging
Agent Login, Call Queuing &
Distribution, Statistics
As features of GSM PBX services
Corporate VoIP
As features of Corporate VoIP services
Internet
As features of Broadband Internet services
MPLS
B
U
N
D
L
I
N
G
As features of MPLS services
Slide 6
Standard Package
•
PABX Services (start with 10 extensions, additional: per 10 extensions)
– Standard (extension to extension call, call forwarding, call bearing etc.)
– Premium (conference call, auto attendant etc.)
•
VoIP Service enable
•
GSM PABX Service enable
•
Access (MPLS Platinum)
•
CPE will be managed by partner (optional, customer can managed itself)
Enterprise
LAN
WAN
MPLS
VPN
VoIP
Port
TDM
PBX
PSTN
XL
VoIP
SIP
Custom
er LAN
PLMN
Enterpri
se IP
PBX
XL
GSM PBX
SIP
XL
GSM
Listed
Number
Instant
Office
Services
XL MPLS/VPN
HOSTED PBX SERVICE
XL Hosted PBX
System
Other XL Services
BUNDLING
Slide 7
How it works
XL SIP Service is powered by Broadsoft
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL
BroadWorks Open Protocols
–
SIP: Session Initiation Protocol
•
–
MGCP: Media Gateway Control Protocol
•
–
Access device or network device Application Server or Network Server look ups
SSH (TELNET): Secure Shell
•
–
Voice mail storage and retrieval
DNS: Domain Name Server
•
–
Voice mail forwarding, call notification e-mail
POP3/IMAP: Post Office Protocol / Internet Message Access Protocol
•
–
Web access to Application Server or Network Server, encrypted HTTP transactions for required pages
SMTP: Simple Mail Transfer Protocol
•
–
OSS provisioning interface for Application Server or Network Server XML over CORBA
HTTP/HTTPS: HyperText Transfer Protocol or HyperText Transfer Protocol Secure
•
–
Multi-media streaming
CORBA: Common Object Request Broker Architecture
•
–
Call control
RTP: Real-Time Transport Protocol
•
–
Call control, IM&P SIMPLE
Management access
SNMP: Simple Network Management Protocol
•
BroadWorks server traps and performance measurements
Slide 9
BroadWorks Proprietary Protocols
–
MCP: Media Server Control Protocol
•
–
MSS: Media Server Selection
•
–
Application Server to Network Server look up for serving Application Server for user (XML over CORBA)
TTREP: TimesTen Replication
•
–
Application Server to Network Server automatic propagation of group and user information (XML over CORBA)
LocationAPI: Network Server Portal API
•
–
Attendant Console control and updates
SyncAPI: Network Server Synchronization
•
–
Call Manager control and updates
ACAP: Attendant Console Protocol
•
–
Application Server to AS/AS to Network Server redundancy active node tracking
CPP: CommPilot Push Protocol
•
–
Application Server to Network Server request for list of geographically located Media Servers
ASR: Application Server Redundancy
•
–
Application Server to Media Server session control
TimesTen Database replication between Application Server and Network Server cluster peers
RSYNC
•
File synchronization (system prompts, greetings)
Slide 10
BroadWorks: Call Control Protocols
NS2
NGW1
NGW2
NS1
SIP
OSS/NMS
SIP
MSS
SIP
SIP
DNS
AS secondary
AS primary
MCP
MS1
MS2
SMTP
SIP
CS1
POP3
SIP
SIP Access
MGCP
MGCP Access
CS2
PC - Browser
Slide 11
BroadWorks: Media Streaming Protocols
NS2
NGW1
NGW2
NS1
OSS/NMS
RTP
DNS
AS secondary
AS primary
RTP
RTP
MS1
MS2
SMTP
RTP
CS1
POP3
CS2
RTP
SIP Access
MGCP Access
PC - Browser
Slide 12
BroadWorks: Redundancy Protocols
RSYNC
NGW1
NGW2
TTREP
OSS/NMS
NS2
NS1
DNS
SyncAPI
SMTP
ASR
MS1
MS2
AS secondary
AS primary
CS1
POP3
CS2
TTREP
RSYNC
PC - Browser
SIP Access
MGCP Access
Slide 13
BroadWorks: User Web Access
Protocols
NGW1
NGW2
OSS/NMS
NS2
NS1
MS1
DNS
MS2
LocationAPI
SMTP
AS secondary
AS primary
CS1
CS2
POP3
HTTP/HTTPS
HTTP/HTTPS
CPP/ACAP
SIP Access
MGCP Access
PC - Browser
Slide 14
BroadWorks: Management & Vmail Protocols
NGW1
NGW2
OSS/NMS
HTTP(S)/SSH/Corba
NS2
NS1
SNMP
HTTP(S)/SSH/Corba
MS1
AS secondary
AS primary
MS2
SSH
DNS
POP/IMAP
POP3
HTTP(S)
SMTP
CS1
CS2
SMTP
SIP Access
MGCP Access
PC - Browser
Slide 15
SIP Overview
• Session Initiation Protocol (SIP)
– Internet Engineering Task Force (IETF) standard for multimedia
conferencing over IP
• SIP is an ASCII-based, application-layer control protocol (defined in
RFC 3261) that can be used to establish, maintain, and terminate calls
between two or more end points
• SIP provides the capabilities to:
– Determine the location of the target end point
– Determine the media capabilities of the target end point—via Session
Description Protocol (SDP)
– Determine the availability of the target end point
– Establish a session between the originating and target end point
– Handle transfer and termination of calls
• BroadWorks Application Server acts as a back-to-back user agent
– Terminates the incoming call-half, applies services and if necessary,
originates an outgoing call-half
Slide 16
SIP Overview
• SIP (Methods) Requests
– INVITE—Indicates a user or service is being invited to participate in
a call session
– ACK—Confirms that the client has received a final response to an
INVITE request
– BYE—Terminates a call and can be sent by either the caller or the
callee
– CANCEL—Cancels any pending searches but does not terminate a
call that has already been accepted
– OPTIONS—Queries the capabilities of servers
– PRACK – Provisional acknowledgement
– REGISTER—Registers the address listed in the To header field with
a SIP server
Slide 17
SIP Overview
• Types of responses used in response to a Request
– SIP 1xx—Informational Responses (for example, 180 Ringing)
– SIP 2xx—Successful Responses (for example, 200 OK)
– SIP 3xx—Redirection Responses (for example, 302 Temporarily Moved)
– SIP 4xx—Client Failure Responses (for example, 404 User Not Found)
– SIP 5xx—Server Failure Responses
– SIP 6xx—Global Failure Responses
– Registration Process
– Registration occurs when a SIP client must inform the Application Sever of
its location
– During this process, the client sends a REGISTER request to the
Application Server and includes the address (or addresses) at which it can
be reached
– Registrations can require Authentication (shared-secret)
Slide 18
SIP Overview
• Invitation Process
– An invitation occurs when one SIP end point (user A) "invites"
another SIP endpoint (user B) to join in a call
– User A sends an INVITE message to the Application Server
requesting that user B join or set up a call
– Application Server processes the request and returns an
appropriate response (for example, 100 Trying, 487 User Busy)
– If necessary, the Application Server initiates a terminating callhalf to user B and mediates the two call-halves
– If user A no longer wants to end the call, it sends a BYE
message
Slide 19
SIP INVITE Message
Dialed Digits
Originator
INVITE sip:2403645138@192.168.5.253;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.5.214:5060
From: "2403649314" <sip:2403649314@192.168.5.253>;tag=0003e3630c9
To: <sip:2403645138@192.168.5.253;user=phone>
Call-ID: 0003e363-0c9406d6-124f754f-085ca146@192.168.5.214
Date: Tue, 04 Jun 2002 19:52:42 GMT
CSeq: 101 INVITE
User-Agent: AccessDevice
Unique Callid associates
Contact: sip:2403649314@192.168.5.214:5060
Expires: 180
related to a call
Content-Type: application/sdp
Content-Length: 170
Accept: application/sdp
v=0
o=SDP 26088 15595 IN IP4 192.168.5.214
s=SIP Call
RTP listen port
c=IN IP4 192.168.5.214
t=0 0
m=audio 23890 RTP/AVP 0 8 18
a=rtpmap:0 PCMU/8000
all messages
Codecs
Slide 20
SIP Basic Call Flow
SIP Device
INVITE
BroadWorks
100 Trying
180 Ringing or 183 Session Progressing
PRACK (Optional)
200 OK (PRACK - Optional)
200 OK (INVITE - Answer)
ACK
RTP – two-way voice path
BYE
ACK
Slide 21
MGCP Overview
• Media Gateway Control Protocol (MGCP)
– Internet Engineering Task Force (IETF) standard for multimedia
conferencing over IP
• MGCP is an ASCII-based, application-layer control protocol (defined in
RFC 2705) that can be used to establish, maintain, and terminate calls
between two or more endpoints
• MGCP is a client-server protocol. The Call Agent (server) handles all
aspects of setting up calls to and from endpoints
• MGCP provides the capabilities to:
– Determine the location of the target end point
– Determine the media capabilities of the target end point—via Session
Description Protocol (SDP)
– Determine the availability of the target end point
– Establish a session between the originating and target end point
• BroadWorks Application Server acts as an MGCP Call Agent (CA)
Slide 22
MGCP Overview
• MGCP messages composed from short list of primitives
• NotificationRequest (RQNT)—Instructs the MGCP device to watch for
specific events
• Notify (NTFY)—Informs the CA when requested events occur
• CreateConnection (CRCX)—Creates a connection to an endpoint
• ModifyConnection (MDCX)—Changes the parameters associated with
an established connection
• DeleteConnection—Deletes an existing connection. ACK returns call
statistics
• AuditEnpoint (AUEP)—Audits an existing endpoint
• AuditConnection (AUCX)—Audits an existing connection
• RestartInProgress (RSIP)—Is a gateway notification to the CA that an
MG or an endpoint is restarting or stopping
Slide 23
MGCP Overview
• Notification Messages
– MGCP device uses these messages to tell the CA of a change of
state
– Typically involve signaling or events
– Examples:
• Signals: Ringing, distinctive ringing, ring back tone, dial tone,
intercept tone, network congestion tone, busy tone, confirm tone,
answer tone, call waiting tone, off-hook warning tone, pre-emption
tone, continuity tone, continuity test, DTMF tones
• Events: On-hook transition, off-hook transition, flash hook, receipt of
DTMF digits
Slide 24
MGCP Sample Messages
MGCP Endpoint
NTFY 353 aaln/s1/3@[192.168.5.77] MGCP 0.1
X: 1
O: L/hd
NTFY
200
RQNT
200 4 OK
NTFY 354 aaln/s1/3@[192.168.5.77] MGCP 0.1
X: 4
O: D/7702T
200
200 353
RQNT 4 aaln/s1/3@[192.168.5.77] MGCP 0.1
D: (xx.[T#]|0[T#]|0[2-9]xxxxxxxxx|1[2-9]xxxxxxxxx
|[2-9]xxxxxxxxx|*xx)
Q: loop,discard
R: L/hf(I,K), D/[*0-9#T](D), L/hu(E(L/hd;;),N,K),
L/oc(E(L/hu, L/hf(I,K);L/ot;),N)
X: 4
S: L/dl
NTFY
200
CRCX
200 5
I: 68
v=0
o=- 4 0 IN IP4 192.168.5.77
s=Cisco SDP 0
c=IN IP4 192.168.5.77
t=0 0
m=audio 16400 RTP/AVP 0
BroadWorks
200 354
CRCX 5 aaln/s1/3@[192.168.5.77] MGCP 0.1
C: 4
M: recvonly
L: a:PCMU
Q: loop,discard
R: L/hu(E(L/hd;;),N,K), L/hf(I,K)
X: 6
200
Slide 25
Call-Half Model: Typical Call Setup
Originating
Sip Node A
(1) SipInviteEvent
Terminating
Sip Node B
Internal
Events
SIP
Call
Half
Session
(A)
(2) InvitationEvent
(3) InvitationReceivedEvent
SIP
Call
Half
Session
(B)
(4) SipInviteEvent
(5) 18x Ringing Event
(6) AlertingEvent
(7) 18x Ringing Event
(8) 200 OK Event
(10) AnswerEvent
(11) 200 OK Event
(9) AckEvent
(12) AckEvent
RTP Media
Slide 26
How to Connect
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL
Network Architecture
Enterprise Data Center
Solaris / SPARC
AES Servers
XL VOIP
IP
Router
APX
Universal
Gateway
Hosted
Enterprise
VoiceMail
PRI
XL MPLS
XL GSM
Lucent Brick* Firewall
WAP
Enabled
PDA
IP
SIP
SIP
Phone
Router
PRI
MGCP
SIP
IAD
Analog
Phone
Windows,
SunRay
SIP Softphone
PSTN
MultiLocation
PSTN
Access
IP
Enterprise Directory,
Call Logs, VoiceMail
Messaging &
Database, DNS
Location 2
Location 1
Slide 28
How to Connect
• Customer must have XL MPLS connection
• Additional setting will be added by XL in CE (Customer Edge)
MPLS Router will  ALG (Access Layer Gateway) setting.
• After ALG has been set up, the AES will recognize the IP
Address Gateway and designated Port for every subscriber.
• XL will create SIP subscriber remotely (in AES) based on
customer gateway. (subscriber hierarchy in the next slide)
• SIP CPE (Customer Premise Equipment) will be set up by
customer. The setting will be:
– Set IP Address
– Set SIP Proxy
– Set User ID and Password
Slide 29
Application Server User Hierarchy
System Provider
Service provider  Reseller
Group or department  Small or medium enterprise
User  End user
System Provider
Service
Provider
Service
Provider
Group
Group
Group
Group
Dept
Dept
Dept
Dept
Users
Users
Users
Users
Virtual System
Virtual System
Slide 30
CPE of XL Hosted PBX
Widest Variety of Endpoints
SIP/MGCP End-User Device Options
•
•
•
•
•
•
•
•
Soft-phones
Hard-phones
Line gateways
Trunk gateways
IADs
VoIP phones
Firewalls
Remote
Survivability/Monitoring
Polycom
SwissVoice
UniData WiFi
Uniden
Cisco
Verilink
Lucent APX®
AudioCodes
Edgewater
Citel
Microsoft
For additional device availability – see pdf file
XTen
Slide 31
How to Survive
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL
How to Survive when MPLS goes down
Voice call 1
PSTN
Voice call 2
XL MPLS
XL
Hosted
PBX
•
•
•
•
Survivability
Gateway
Layer 2 Switch
10/100
T1
XL provides gateway which have survivability features (optional)
Pre configure (by XL - optional) when first installation in customer
Automatically takes over upon WAN failure
Automatically exits survivability upon restoral
Slide 33
Geographical Redundant Deployment (2007 plan)
Site 1
Site X
LAN
LAN
Data Center 1
Data Center 2
National Backbone
Server AES
Router
Managed IP
Data Center
Retail Sites
IP Phone
Slide 34
Thank You
This document contains
confidential and proprietary information
belonging to XL,
which information may be used
only in connection with the business of XL