Microsoft® Lync™ Server 2010
High Availability and Resiliency
Module 12
Microsoft Corporation
Session Objectives and Takeaways
Session Objectives:
•
Resiliency Architecture
•
Branch Office Resiliency
•
Data Center Resiliency
Takeaways:
•
Microsoft Lync Server 2010 Architecture provides High Availability for Voice services
•
Survivable Branch Appliance built by UC partners delivers Voice High Availability for branch users
•
Metropolitan Data Center Resiliency delivers High Availability for all UC modalities across
datacenters separated by high bandwidth & low latency
•
Voice Data Center Resiliency delivers Voice High Availability across geo-dispersed datacenters
2
Agenda
•
•
•
•
•
Main Concepts
High Availability
Branch Office Resiliency
Data Center Voice Resiliency
Metropolitan Data Center Resiliency
3
Main Concepts
4
Survivable Branch Appliance (SBA)
A purpose-built appliance optimized to provide resilient multi-modal
communication for maximizing branch office user productivity
Data Center
Edge
Server
Branch Office
Lync
Pool
SBA
WAN
PSTN
Components
Windows Server® 2008 R2
Mediation Server
Registrar
PSTN Gateway
Functionality
Normal/Failover mode
SIP Registrar
SIP Proxy and Routing engine
PSTN connectivity
Voicemail routing
PSTN re-routing
Centrally provisioned
Up to 1000 user support
Go-To Market
OEM (Embedded channel)
5 partners
• Audiocodes
• Dialogic
• Ferrari
• HP
• NET
5
Terminology
•
DNS Load Balancing (DNS LB) is NOT the same as DNS Round Robin (DNS RR)
•
DNS RR: DNS Server is configured for Round Robin and returns a list of IP
addresses for a Pool FQDN in different order
•
•
•
Pool.contoso.com resolves to IP1, IP2, IP3
•
DNS Server replies to 1st Query with (IP1, IP2, IP3)
•
DNS Server replies to 2nd Query with (IP2, IP1, IP3)
•
DNS Server replies to 3rd Query with (IP3, IP2, IP1)
DNS Load balancing
•
Lync Clients and Servers are able to understand multiple IP addresses (Ex: IP1, IP2, IP3)
•
Clients failover if connectivity to one IP fails
•
Servers failover as well as load balance traffic across these IPs
DNS RR complements DNS Load Balancing
6
DNS Load Balancing Goals
DNS Load Balancing Goals
•
Simplify Hardware Load Balancer (HLB) Configuration
•
Reduce dependence on HLB
•
DNS LB supported for Internal Pool, Director Pool
•
All Server-Server and Client-Server SIP traffic
•
All Server-Server HTTP traffic
•
Media traffic
•
Support Draining of Applications
•
Improve Load balancing of server-server traffic (Ex: Access Edge – Director)
Eliminating HLB is not a goal
•
HLB still be required
•
Client – Server HTTP & HTTP(s) traffic (ABS, DLX, LIS, etc.)
•
Edge – High availability for PIC and legacy clients
7
Machine DNS A Entries Pool DNS A Entries
Domain Name System Load Balancing
Sample Configuration
For a Lync Server Pool ocspool1.contoso.com with 3 FEs: FE1, FE2, FE3
Pool
VIP
DNS FQDN
DNS A Record IP
ocspool1.contoso.com
172.24.32.150
FE
FE1.contoso.com
172.24.32.151
FE
FE2.contoso.com
172.24.32.152
FE
FE3.contoso.com
172.24.32.153
OCS 2007 R2 HLB - DNS Configuration
DNS FQDN
DNS A Record IP
Web
VIP
lyncweb1.contoso.com
172.24.32.150
Pool
lyncpool1.contoso.com
172.24.32.151
Pool
lyncpool1.contoso.com
172.24.32.152
Pool
lyncpool1.contoso.com
172.24.32.153
FE
FE1.contoso.com
172.24.32.151
FE
FE2.contoso.com
172.24.32.152
FE
FE3.contoso.com
172.24.32.153
Lync Server 2010
DNS LB - DNS Configuration
8
Other Resiliency Enhancements
•
DNS Based Load Balancing for Internal Pools
•
•
•
•
Draining: Ability to “drain a server” before taking the server down
Session Dialog Resiliency for Conferencing
•
•
Only Client – Server HTTP traffic can be DNS Load Balanced
All other traffic CANNOT be DNS Load Balanced
•
Still require HLB for this traffic (NLB not supported)
User can still participate in a conference even if the FE the user is connected to goes
down
Client caches successful connections to Lync Server 2010
•
SIP Registrar, Media Relay Authentication Server (MRAS)/Media Relay (MR) FQDN
and IP
9
High Availability
10
High Availability in OCS 2007 / 2007 R2
Office Communications Server (OCS) 2007 and R2
Registration
Routing
Presence
Conferencing
HLB required for all traffic
Bob’s Lync
Bob’s Phone
2010
Architecture:
•
One monolithic Front End Service
•
Dependency on single shared backend database
(Registration, Routing, Presence, Conferencing)
11
High Availability – Lync Server 2010
Microsoft Lync Server 2010
User Services Database
(Presence and Conferencing)
Registrar
Database
(Registration and
Routing)
Bob’s Lync Bob’s Phone
2010
HLB is optional for SIP traffic
(DNS LB is recommended)
HLB still required for client-server
HTTP Traffic
Architecture:
•
Registrar Role (Registration and Routing). Each
registrar has its own SQL Express database
•
User Services Role (Presence and Conferencing)
•
Registrar and User Services are collocated in the
datacenter (but on different servers)
•
All user end points register with same Front End
•
Users are load balanced by Registrars using a
Distributed Hash Algorithm
•
Registrar can be installed in remote locations
12
Resiliency Architecture
Branch
Office
Registrar
Data Center - EE Pool 1
Presence
Conferencing
Active Directory
AD & DNS
Registrar
(Registration
& Routing)
Bob’s Primary Registrar
& User Services = EE Pool 1
Backup
Registrar
Pool
Backup
Registrar
Pool
Alice’s Primary Registrar
& User Services = EE Pool 2
SBA
Joe’s Primary Registrar = SBA., User Services = EE Pool1
Data Center - EE Pool 2
Active Directory
Presence
Conferencing
AD & DNS
Registrar
(Registration
& Routing)
Architecture:
1.
Each user has a “Primary Registrar Pool”. Each Registrar Pool can have a “Backup Registrar Pool”
2.
User’s client discovers a Registrar Pool through DNS SRV. Directed to “Primary & Backup Registrar Pool”
3.
Backup Registrar heart-beats Primary Registrar. If heart-beat not received within Configurable Failover Interval (default =
120 sec for branch offices), Backup starts accepting client registrations
13
Branch Resiliency
14
Branch Resiliency Options
Large Branch (>1000 users)
Survivable Branch Server
(or SE Server)
AND Separate Media
Gateway
1000
SBA Medium Branch (25-1000
Lync
PSTN / WAN
users)
SBA
500
25
Small Branch (<25 users)
No Local Infrastructure
Or gateway (GW) Only
15
Users
Branch Client Registration Scenarios
Lync Server 2010 Pool
Data Center
Edge
Server
WAN
Data Center
Active Directory
Lync Server 2010 Pool
Edge
Server
Active Directory
Lync Server 2010
Pool
PSTN
SBA
Normal Mode
PSTN
WAN
PSTN
WAN
Users Register with SBA
SBA
SBA
SBA
Signaling
WAN Down
No change
SBA Down
Users register with Backup
Registrar Pool in the
datacenter
16
Client Media and Signaling Paths
WAN available
Data Center
Edge
Server
WAN
Data Center
Active Directory
Lync Server 2010 Pool
Edge
Server
Active Directory
Lync Server 2010 Pool
PSTN
WAN
PSTN
WAN
PSTN
Intra-Branch calls
Signaling/media don’t
traverse wide area network
(WAN)
SBA
SBA
SBA routes the call between
the users
Media
Signaling
Inter-Branch/ HQ calls
Signaling/media traverse WAN
SBA routes the call to the other cluster
Branch PSTN calls
SBA sends the call to Public Switched
Telephone Network (PSTN)
No WAN involved
17
Client Voice Media and Signaling Paths
Key failure scenarios
Data Center
Edge
Server
Data Center
Active Directory
Lync Server 2010 Pool
Gateway
Gateway
Lync Server 2010 Pool
WAN
Edge
Server
Active Directory
Lync Server 2010 Pool
PSTN
WAN
PSTN
PSTN
WAN
Intra-Branch calls
No impact on two party voice/video
/IM/App sharing
SBA
SBA
SBA
Audio conferencing possible (through
PSTN)
No Presence or Video conferencing
Media
Signaling
SBA Down
Inter-Branch/ HQ calls
SBA initiates PSTN re-routing
Clients register with Backup Registrar Pool in datacenter
All functionality driven by that pool over the WAN
Media is over PSTN (only voice)
No loss in functionality
18
User Interface in Normal and Survivability Mode
WAN Up
All Features Available
WAN Down
Basic Voice Features Available
Features Available when WAN Down
PSTN Inbound and Outbound calls
Intra-Site calls
Inter site calls (PSTN Rerouting)
Hold, Retrieve, Transfer
Authentication, Authorization
Voicemail Deposit (Redirect to Exchange UM in
Data Center)
Voicemail Retrieve (through PSTN)
Call Forwarding, SimulRing
Boss-Admin, Team-call
Call Detail Records (CDR)
All 2 Party Intra Site communications
Audio Conferencing through PSTN
Contact Search
Features Unavailable
Inter-site Data (IM, App Sharing, etc.)
Conferencing (IM, Video and Web)
Presence & DND based routing
Modify Presence or Change Call Forwarding
Settings
Contact List
 Resilient Lync Server 2010 clients: Lync 2010, Attendant Console, Lync Phone Edition
Response Group and Call Park
19
Branch Office: Lync Server 2010 Discovery
WAN
Branch Office
Data Center
1. DNS SRV Query
Active Directory
Response: (Multiple) Director Pool FQDN
AD DS & DNS
2. TLS to Director Pool. SIP Register
Response: 401 Redirect to Cert Provisioning
5. SIP Register
Bob
Response: 301 Redirect
Primary: SBA FQDN, Backup: EE Pool FQDN
Lync Server 2010
Director
3. https;//PoolFQDN/CertSvc
6. SIP-TLS Register
200 OK
(Cert Auth)
Client caches SBA FQDN
And IP Address
SBA
IIS - IWA Auth
Get Certificate
4. Certificate Replication
Lync Server 2010 Enterprise Edition Pool
20
Branch Office – Server Connectivity when
WAN Is Down
Data Center
Branch Office
TLS to cached FQDN and IP
SIP Register
(Cert Auth)
SBA
Active Directory
AD DS & DNS
200 OK
Bob
WAN
Branch Office
DHCP Options
120 Query
SBA FQDN
Alice
(new client)
TLS to SBA FQDN
SIP Register
(Cert Auth)
Lync Server 2010
Director
DHCP Server or
Lync DHCP on SBA
SBA
Lync Server 2010 EE Pool
200 OK
21
Data Center Voice Resiliency
22
Data Center Voice Resiliency (EE)
Failover to backup data center
North America Data Center
Backup
Registrar
Features Available to Users
In Case of Data Center Disaster
PSTN Inbound calls
(if Carrier offers this resiliency)
Europe Data Center
PSTN Outbound calls
Intra-Site calls and Inter site calls
Hold, Retrieve, Transfer
Authentication, Authorization
Lync Server
2010
Edge1
Lync Server 2010
Pool 1
WAN
Lync Server 2010
Pool 2
Lync Server
2010
Edge2
2 Party Intra Site Instant Messaging (IM) and
Audio/Video (A/V)
Call Detail Records (CDR)
Call Forwarding, SimulRing
Boss-Admin, Team-call
Failover
Join conferences scheduled by users homed on
other pool
Features Unavailable
•
•
•
•
•
•
Lync Server 2010 Pool. That Lync Server 2010 Pool directs client to primary and
backup SIP registrar
Client attempts connect to Primary Registrar Pool, if fails, connects to Backup
Limited feature set available on failover
Enable/Disable Automatic failover, Configurable Failover interval
Automatic Failback, Configurable Failback interval (No manual failback. Workaround:
Stop Front End Services on Primary Registrar pool servers)
What happens if Primary Data Center cannot be restored?
Conferencing Auto Attendant (AA) (through
PSTN)
Schedule IM, A/V & Web Conferences
Presence and Do Not Disturb (DND) based
routing
Updating Call Forwarding settings
Response Group Service & Call Park
Voicemail Deposit (Redirect to Exchange UM in
the datacenter)
Voicemail Retrieve (through PSTN) 23
Data Center Voice Resiliency (SE)
Failover to backup data center
North America Data Center
Backup
Registrar
Features Available to Users
In Case of Data Center Disaster
PSTN Inbound calls
(if Carrier offers this resiliency)
Europe Data Center
PSTN Outbound calls
Intra-Site calls and Inter site calls
Hold, Retrieve, Transfer
Authentication, Authorization
Lync Server
2010
Edge1
Lync Server 2010
Pool 1
WAN
Lync Server 2010
Pool 2
Lync Server
2010
Edge2
2 Party Intra Site Instant Messaging (IM) and
Audio/Video (A/V)
Call Detail Records (CDR)
Call Forwarding, SimulRing
Boss-Admin, Team-call
Failover
Join conferences scheduled by users homed on
other pool
Features Unavailable
•
•
•
•
•
•
•
SE Servers operate as separate systems
Client DNS SRV request discovers (one or multiple) Lync Server 2010 SE. That Lync Server 2010 SE
sever directs client to primary and backup SIP registrar
Client attempts connect to Primary Registrar, if fails, connects to Backup
Limited feature set available on failover
Enable/Disable Automatic failover, Configurable Failover interval
Automatic Failback, Configurable Failback interval (No manual failback. Workaround: Stop Front End
Services on Primary Registrar servers)
If Primary Data Center cannot be restored:
•
Restore Central management Server in backup datacenter
•
Restore other services including Presence, Conferencing by “moving” users to other Pool
Conferencing Auto Attendant (AA) (through
PSTN)
Schedule IM, A/V & Web Conferences
Presence and Do Not Disturb (DND) based
routing
Updating Call Forwarding settings
Response Group Service & Call Park
Voicemail Deposit (Redirect to Exchange UM in
the datacenter)
24
Voicemail Retrieve (through PSTN) 24
Data Center Voice Resiliency
Failover to backup data center (discovery)
North America Data Center
Europe Data Center
Backup
Registrar
Lync Server
2010
Edge1
Lync Server 2010 Director Lync Server 2010
Pool
Pool 1
WAN
Lync Server 2010
Pool 2
Lync Server
2010
Edge2
Active Directory
AD DS & DNS
(1)
1.
2.
3.
4.
5.
6.
(2)
(3)
(4)
(5)
(6)
Client DNS SRV request. Example: DNS SRV for _sipinternaltls._tcp.contoso.com
DNS SRV Response includes
•
Lync Server 2010 Director Pool.contoso.com:5061 Priority=0, Weight=10
•
Pool2.contoso.com:5061 Priority=1 , Weight=10
Client connects via TLS to Lync Server 2010 Director Pool. Sends SIP Register. Authenticates
Lync Server 2010 Director Pool redirects client. SIP 301 includes Primary & Backup Registrar pool
If Primary Registrar Pool is available, client connects and registers with it
Else client connects and registers with Backup Registrar Pool (Lync Server 2010 Pool 2)
25
Metropolitan Data Center
Resiliency
26
Metropolitan Data Center Resiliency
Lync Server 2010 Pool extended across two data centers
NY Data Center
NJ Data Center
Features Available to Users
If One Data Center goes Down
Passive SQL
Active SQL
PSTN Inbound calls
PSTN Outbound calls
Intra-Site calls and Inter site calls
Hold, Retrieve, Transfer
Lync
Server
2010
Edge
FE 1-2
Low-Latency
WAN
FE 3-4
Lync Server
2010
Edge
Authentication, Authorization
2 Party Intra Site IM and A/V
Call Detail Records (CDR)
Call Forwarding, SimulRing
Boss-Admin, Team-call
Voice Apps (CAA, Response Group, Call Park)
•
•
•
•
Lync Server 2010 pools operate as one logical system
•
Split Front End pool across two datacenters (all FEs active)
•
SQL Geo cluster for backend (Stretched Virtual Local Area Network (VLAN))
•
Data replication is done by storage arrays (Ex: EMC SRDF, HP CLX EVA)
•
Requires low latency WAN (15 milliseconds)
In one site is down, clients are serviced by FEs in other site
Nearly all features available
•
PSTN termination may affect inbound calls
Failback has to be manually initiated
Conferencing (IM, A/V and Web)
Presence and DND based routing
Updating Call Forwarding settings
Features Available Depending on
Ex-UM Deployment
Voicemail Deposit
Voicemail Retrieve
27
Metropolitan Data Center Resiliency
Lync Server 2010 Pool extended across two data centers
NY Data Center
Features Available to Users
If One Data Center goes Down
NJ Data Center
PSTN Inbound calls
Passive SQL
Active SQL
PSTN Outbound calls
Intra-Site calls and Inter site calls
Hold, Retrieve, Transfer
Authentication, Authorization
Lync
Server
2010
Edge
Low-Latency
WAN
FE 1-2
FE 3-4
Lync Server
2010
Edge
2 Party Intra Site IM and A/V
Call Detail Records (CDR)
Call Forwarding, SimulRing
Boss-Admin, Team-call
Voice Apps (CAA, Response Group, Call Park)
Conferencing (IM, A/V and Web)
Presence and DND based routing
Updating Call Forwarding settings
DNS Srv
DNS Server
Pool.contoso.com
Features Available Depending on
Ex-UM Deployment
Voicemail Deposit
Voicemail Retrieve
28
Survivable Branch Appliance
29
Survivable Branch Appliance
Centrally
Managed
Voice high
availability
for
branches
SBA
Sold and
supported
by UC
partners
Appliance form
factor with
Hardened
Windows
Server 2008
R2
30
Survivable Branch Appliance Deployment
Simple, easy, repeatable
AD Computer
Lync Server
2010
Administrator
(Data Center)
Add SBA to
Topology
Move Users to
SBA
Data Center
•
•
SBA Drop Shipped w/
Software installed
•
•
Technician connects to
SBA-WEB based GUI
IP Configuration
•
Join to Domain
•
•
Branch
•
Enable Lync
Server 2010
Replica
SBA downloads
topology & config
Request/Assign
Certs
•
•
Start Lync Server 2010
services
Finish GW Config
Test PSTN
ConnectivityMake/Receive call
using Test User
account
31
SBA – Central Management
Centralizing move, add, changes
Lync Server 2010
administrator
(Data Center)
• Change Normalization Rules
• Change Routing Rules
• Change User Policies
•
•
•
•
Lync Server 2010 Central Management
Server
Store Configuration
Replicate to SBA
Data Center
Survivable Branch
Appliance
Branch
Replicated to the SBA
32
Survivable Branch Appliance
Support and service
•
•
SBA is supported and serviced by the SBA partner
Windows Server Updates
•
•
•
SBA partner can act as the gatekeeper OR
Customers can deploy updates
Microsoft Lync Server 2010 updates
•
SBA partner will test and release product notice on whether a particular
update can be applied on the SBA
Original equipment
manufacturer (OEM) notified
about impending Lync
Server 2010 Updates
X-5 Biz Days
OEM Downloads and
tests the updates
Compatibility
issues
Date X
MSFT Update
Partner addresses the
issue if any
Partner notifies
the customer on
updates
compatibility
X+30 Days
33
Survivable Branch Appliance Partner
Solutions
Audiocodes two form factor
•M1k –1U, 4E1/T1, redundant power supply
•MSBG-Firewall, Routing engine
•M2k – 1U, 480 concurrent calls, redundant power supply
Audiocodes: Existing M1k and M2k
gateways can be converted to SBA
Dialogic DMG 4000
•1U, 4 E1/T1
•Redundant power supply
Dialogic: Existing DMG4000 Hybrid
can be converted to SBA
NET UX Series
•1U, 8 E1/T1, Redundant power supply
•MSBG-Firewall, Routing engine
NET: New HW to support SBA.
Migration plan for customers
wanting to move to UX platform
Ferrari
•1U, 4 E1/T1, Redundant Power supply
HP Procurve
•Survivable Branch Appliance Module running on 54xx switch
Chassis
•Redundant Power supply, 8 E1/T1, Layer 2 functionality
Ferrari: Existing R2 Hybrid gateway
can be converted into SBA
HP: Customers using ProCurve
switches can convert it into a SBA
by buying the module
34
Summary
•
Lync Server 2010 Architecture provides High Availability for Voice
services
•
Survivable Branch Appliance built by UC partners delivers Voice
High Availability for branch users
•
Metropolitan Data Center Resiliency delivers High Availability for
all UC modalities across datacenters separated by high
bandwidth and low latency
•
Voice Data Center Resiliency delivers Voice High Availability
across geographically dispersed datacenters
35
Q&A
36
Appendix – Survivable Branch
Appliance Partners
37
Dialogic® 4000 Media Gateway Series
Survivable Branch Appliance
•
Dialogic® 4000 Media Gateway Series (DMG4000)
•
•
•
Broad Hybrid Gateway Product Line and Scalability
•
•
•
•
•
Complete Support for Microsoft Unified Communications
•
Qualified Hybrid Gateway for Office Communications Server 2007 R2
•
•
Certified for Exchange Server 2010 Unified Messaging
Ready for Lync Server 2010
•
•
Performs ‘Survivable Branch Appliance’ Server Role (Lync Server 2010
Release)
‘Survivable Branch Appliance’ Survivability Features
•
•
•
•
•
Local PSTN Connectivity
Local Lync Server 2010 Wave 14 and Analog Endpoint Registration
Alternative Routing Rules
Active Directory® Domain Services Look Up
•
•
•
Support for Advanced Technology Attachments (ATAs) and Foreign Exchange
Station (FXS) Gateways from Grandstream and Cisco
•
•
Easy to deploy - 1, 2, 4, 8, 24 port solutions
Low cost per port
•
•
•
•
Conference Phones, Fax Machines, Plain Old Telephone System (POTS), elevator
phones, loading docks, checkout registers, paging systems, etc .
Ready for Lync Server 2010
RTP: G.711, G.729, sRTP w/ TLS
Robust Windows 2008 Server Platform
•
•
Exclusive V.34 Fax / FoIP speed
Exceeds Transcoding and Security Requirements
•
•
Interface for any number of Analog Devices
•
Analog Foreign Exchange Office (FXO), Primary Rte Interface (PRI),
Basic Rate Interface (BRI), Integrated Services Digital Network (ISDN),
code access security (CAS), Q.SIG protocols
SIP (RFC32XX), Microsoft SIP (TCP Transport), Microsoft Secure SIP:
TLS
T.30 (PSTN) Fax to T.38 (FoIP)
•
•
Flexible, Cost Effective Support for Analog Devices
•
Complete PBX, PSTN, IP and Fax Protocol Support
•
Performs Mediation Server Role
Field Software Upgrade to Survivable ‘Survivable Branch
Appliance’
•
•
8 port, 8 channel FXO - Analog to SIP
8 port, 16 channel - BRI to SIP
24/30 channel - T1/E1 to SIP
48/60 channels - dual T1/E1 to SIP
96/120 channels - Quad T1/E1 to SIP
Dual Xeon® 3.0 Ghz processors offers more resource processing
power for up to 120 UC sessions and more
Dual redundant hard disk drives with redundant array of independent
disks (RAID)-1
Dual power supply option
Additional chassis slots for expanding TDM connectivity
Value Added Software Options
•
•
•
•
Centralized Management System
Includes ESTOS CallControlGateway (5 licenses)
Local Microsoft Shared Fax Server Included
Support for Value Added 3rd Party Applications
38
NET
Survivable Branch Appliance
4 T1/E1
WAN Ports
USB Ports
Mgmt Port
Indicator
Lights
Description
QTY
Channel DSP modules
1- 6
USB ports
2+2
Line Cards (rear)
2
Gig-E Ports
8+1 mgmt
AC power supplies
1 or 2
SFP Optical
& Copper
Ethernet
Ports
COM Express
Interface (SBA)
Gig-E
LAN/WAN ports
Fans
39
Ferrari
Survivable Branch Appliance
•
Unique hardware approach for Microsoft Lync Server 2010 SBA
•
•
HP Server Hardware Certified for Windows Server 2008 R2
High performance, high availability, Integrated Lights Out (ILO) remote management
Integrated Gateway Hardware: 4 analog ports, 4 digital interfaces: 4 BRI or 2 BRI/2
PRI, expandable PCIe Gateway card 100% self contained, using LAN-interface
+
40
HP Procurve
Survivable Branch Appliance
HP ProCurve ONE Services zl Module:
• Intel Core 2 Duo
• 250G HDD
• 2 x 10G Ethernet connections to network fabric
PSTN Gateway
•Up to 8 T1/E1 ports
•Up to 4 FXS or FXO
ports
Supported in zl series chassis:
ProCurve Switch 8212zl
• 5400zl for edge and branch (4U/7U)
• 8200 with high availability for core and distribution
(9U)
41
Audiocodes
Survivable Branch Appliance
Uniform Functionality, Manageability and Protocol Support
•
Entry level and Mid Range – Mediant 1000 SBA
•
Up to 4 E1/T1 + a mix of up to 20 BRI/FXS/FXO in 1U chassis
•
Up to 120 concurrent PSTN Calls, 1000 Users
•
Hardware and software scalability option
•
High End – Mediant 2000 SBA
•
Up to 16 E1/T1 in 1U chassis
•
Up to 480 concurrent PSTN Calls, 1000 Users
•
Software scalability option
42
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