Cisco Systems OL-11591-01 User Manual
CHAPTER
12
IP Video Telephony Configuration
This topic provides an overview of how IP Video Telephony was configured for Cisco IP
Communications Release 5.1(1) testing. This topic does not include detailed installation and
configuration instructions. Rather, it is intended to provide you with guidance and serve as a reference
as you set up video devices in your IP telephony solution.
For additional information and guidelines for implementing Cisco IP Video Telephony, refer to the
documents listed Table 12-1. You can also refer to documentation provided by the vendors of Tandberg
video endpoints and Polycom video endpoints.
Table 12-1 IP Video Telephony Related Documentation
Document Reference
Cisco Unified CallManager System Guide
“Understanding Video Telephony” chapter
IP Video Telephony Solution Reference
Network Design (SRND) for
Cisco Unified CallManager
Cisco UnifiedVideoconferencing3500 Series
video conferencing products documentation
Cisco Unified Video Advantage
documentation
Deploying Video Telephony http://cco/en/US/partner/about/ac123/ac114/ac173/
http://www.cisco.com/univercd/cc/td/doc/product/
voice/c_callmg/5_0/sys_ad/5_0_2/ccmsys/index.htm
http://www.cisco.com/go/srnd
http://www.cisco.com/en/US/products/hw/video/
ps1870/tsd_products_support_series_home.html
http://www.cisco.com/en/US/products/sw/voicesw/
ps5662/tsd_products_support_series_home.html
Q3-04/tech_videotel.html
(You must be a registered user of Cisco.com to access
this URL)
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This topic includes the following sections:
• IP Video Telephony Components and Topology, page 12-2
• Supported Call Types, page 12-4
• Call Routing, page 12-5
• Gatekeeper Configuration for IP Video Telephony, page 12-7
• Cisco Unified Videoconferencing 3540 MCU Conference Bridge Configuration for IP Video
Telephony, page 12-9
• Cisco Unified Videoconferencing Gateway Configuration for Video PSTN Gateway, page 12-13
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Chapter 12 IP Video Telephony Configuration
IP Video Telephony Components and Topology
• Cisco Unified CallManager Configuration for IP Video Telephony, page 12-16
• Video Endpoints Configuration, page 12-26
IP Video Telephony Components and Topology
The IP Video Telephony test deployment included the following components:
• Cisco Unified IP Phone 7985
• Cisco Unified Video Advantage
• Cisco Unified Videoconferencing 3521 with EMP
• Cisco Unified Videoconferencing 3526
• Cisco Unified Videoconferencing 3540 MC10A/MC10A MCU with EMP3
• Cisco Unified Videoconferencing 3540-GW2P
• Cisco Unified Videoconferencing 3545 MCU with EMP3
• Cisco Unified Videoconferencing 3545-GW2P
• Third-party SCCP endpoints
• Third-party H.323 endpoints
• SCCP/H.323 conference bridge
Figure 12-1 shows how Cisco IP Video Telephony was deployed in Cisco IP Communications Release
5.1(1).
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Chapter 12 IP Video Telephony Configuration
Figure 12-1 IP Video Telephony Topology
Dallas
Dallas
(DFW)
(DFW)
H.323
H.323
Videoconferencing
Videoconferencing
MCU
MCU
SCCP
(SJC)
(SJC)
SCCP
IP
IP
SCCP
Tandberg
MXP 990 x 2
Polycom
VSX7000 x 2
Tandberg
T1000 MXP
7985
Tandberg
MXP 990
Tandberg
T1000
SIP
SIP
H.323
SCCP
SCCP
Polycom
VSX7000
San Jose
San Jose
H.323
H.225H.225
SCCP
SIP
Aggregator
SIP
Rockford
Rockford
Video Zone
Video Zone
RAS
(RFD)
(RFD)
SIP
WAN
GK
GK
Video Zone
H.225H.225
SIP
SCCP
SCCP
GK
H.323
H.323
SCCP
SCCP
H.225
IP Video Telephony Components and Topology
Raleigh
Raleigh
(RDU)
(RDU)
SCCP
SCCP
7985
Tandberg
T1000 MXP
New York
New Y ork
(NYC)
H.225
(NYC)
SCCP
Tandberg
T1000
SCCP
SCCP
SCCP
H.323
HNL2
SRST
HNL1
SRST
SCCP
Tandberg
MXP 990
Polycom
VSX7000
SCCP
IP
Cisco VT
Advantage
7985
IP
Cisco VT
Advantage
7985
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IPIP
Cisco VT
Advantage
Tandberg
T1000
7985
Tandberg
T1000
Cisco VT
Advantage
Tandberg
T1000 MXP
T andberg
T1000 MXP
7985
Figure 12-2 shows an example of a multi-site centralized video deployment that uses a Cisco IP Video
Telephony PSTN gateway.
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12-3
Supported Call Types
Chapter 12 IP Video Telephony Configuration
Figure 12-2 Multi-Site Centralized VIdeo Deployment using Cisco IP Video Telephony PSTN
Gateway
T1000
SCCP controlled
T770 MXP
SCCP controlled
IP
Cisco Unified
Video Advantage
SCCP controlled
Video MCU
H.323 or SCCP controlled
3511 and EMP/3540
T2500
H.323 controlled
T880
H.323 controlled
CAT3524
7206 VXR
CAT6509
V
V
Video PSTN
Gateway
3540/3526
ATM/Frame Relay
Video
Gatekeeper
PRI
or MPLS
PSTN
cloud
PRI
MPLS
E1-E3
ATM Link
T1000
SCCP
controlled
2621XM SRST
2621XM SRST
(MGCP) GW
(MGCP) GW
T1000
SCCP
controlled
2621XM SRST
2621XM SRST
(MGCP) GW
(MGCP) GW
BRI
SCCP controlled
Cisco Unified Video
Advantage SCCP
CAT3524
V
3521 Video BRI GW
for SCCP endpoint
SCCP controlled
Cisco Unified Video
Advantage SCCP
CAT3524
V
3521 Video BRI GW
for SCCP endpoint
T550 MXP
IP
controlled
T550 MXP
IP
controlled
Supported Call Types
The IP Video Telephony deployment supports video calls made between endpoints as shown in
Table 12-2. In this table,
• V = video and audio
• A = audio only
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12-4
Tanberg video
conference H.320
T6000
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Chapter 12 IP Video Telephony Configuration
Call Routing
Table 12-2 IP Video Telephony Call Type Matrix
PSTN
Third Party
SCCP
Third
Party
SCCP
Endpoint
Third
Party
H.323
Endpoint
Cisco
Unified
IP Phone
7985
Cisco
Unified
Video
Advantage
SCCP
Audio
Only
SCCP
MCU
Conference
H.323
MCU
Conference
PSTN
Gateways
VVVV AVVAV
Cisco
Unified
VIdeoconferencing
SCCP
Endpoint
Third Party
VVVV AVVAV
H.323
Endpoint
SCCPCisco
VVVV AVVAV
Unified
Video
Advantage
SCCP
AAAA AAAAA
Audio Only
SCCP MCU
VVVV AVVAV
Conference
H.323 MCU
VVVV AVVAV
Conference
1
PSTN
AAAA AAAAA
Gateways
H.225 Trunk VVVV AVVAV
SIP Trunk VVVV AVVAA
1. PSTN = public switched telephone network.
Note Cisco Unified CallManager 5.1 supports security on the Cisco Unified IP Phone 7940G/7941G/7960G/
Call Routing
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7961G/ 7970G/7971G running SCCP. These phone models also have video capabilities when associated
with Cisco Unified Video Advantage. If two secure video-capable endpoints call each other, the SCCP
signaling and audio media path will be encrypted. Video will work, however signaling and the video
media path to Cisco Unified Video Advantage will not be encrypted.
The IP Video Telephony deployment supports the following call routings. SCCP endpoints include
SCCP Tandberg T1000, and Cisco Unified Video Advantage associated with Cisco IP Phone models
7940G/7960G/7970G. H.323 endpoints include H.323 Tandberg T1000 and Polycom VSX 7000.
• SCCP endpoint > Cisco Unified CallManager > SCCP endpoint
• H.323 endpoint > Gatekeeper > Cisco Unified CallManager > SCCP endpoint
• SCCP endpoint > Cisco Unified CallManager > Gatekeeper > H.323 endpoint
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Call Routing
Chapter 12 IP Video Telephony Configuration
• H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Gatekeeper > H.323 endpoint
• SCCP endpoint > Cisco Unified CallManager > Gatekeeper > Cisco Unified CallManager >
Gatekeeper > H.323 endpoint
• SCCP endpoint > Cisco Unified CallManager > SIP trunk> Cisco Unified CallManager >
Gatekeeper > H.323 endpoint
• SCCP endpoint > Cisco Unified CallManager > SIP trunk> Cisco Unified CallManager >
SCCP endpoint
• H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Gatekeeper >
Cisco Unified CallManager > SCCP endpoint
• H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Gatekeeper >
Cisco Unified CallManager > Gatekeeper > H.323 endpoint
• H.323 endpoint > Gatekeeper > Cisco Unified CallManager > SIP Trunk >
Cisco Unified CallManager > Gatekeeper > H.323 endpoint
• SCCP endpoint > Cisco Unified CallManager > Gatekeeper > Cisco Unified CallManager > SCCP
endpoint
• SCCP adhoc or Meet-Me video conferences with these call flows:
–
SCCP endpoint > Cisco Unified CallManager > SCCP MCU
–
SCCP endpoint > Cisco Unified CallManager > Gatekeeper > Cisco Unified CallManager >
SCCP MCU
–
SCCP endpoint > Cisco Unified CallManager > SIP trunk > Cisco Unified CallManager >
SCCP MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > SCCP MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Gatekeeper >
Cisco Unified CallManager > SCCP MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > SIP trunk >
Cisco Unified CallManager > SCCP MCU
• H.323 adhoc or scheduled video conferences with these call flows:
–
SCCP endpoint > Cisco Unified CallManager > H.323 MCU
–
SCCP endpoint > Cisco Unified CallManager > Gatekeeper > Cisco Unified CallManager >
H.323 MCU
–
SCCP endpoint > Cisco UnifiedCallManager> SIP trunk > Cisco UnifiedCallManager > H.323
MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > H.323 MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Gatekeeper >
Cisco Unified CallManager > H.323 MCU
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > SIP trunk>
Cisco Unified CallManager > H.323 MCU
• PSTN call with these call flows:
–
SCCP endpoint > Cisco Unified CallManager > Cisco Unified Videoconferencing gateway >
PSTN > Cisco Unified Videoconferencing gateway > Gatekeeper > Cisco Unified CallManager
> SCCP endpoint
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Chapter 12 IP Video Telephony Configuration
–
SCCP endpoint > Cisco Unified CallManager > Cisco Unified Videoconferencing gateway >
PSTN > Cisco Unified Videoconferencing gateway > Gatekeeper > Cisco Unified CallManager
> H.323 endpoint
–
SCCP endpoint > Cisco Unified CallManager > Cisco Unified Videoconferencing gateway >
PSTN > H.320 endpoint
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Cisco Unified Videoconferencing
gateway > PSTN > H.320 endpoint
–
H.323 endpoint > Gatekeeper > Cisco Unified CallManager > Cisco Unified Videoconferencing
gateway > PSTN > Cisco Unified Videoconferencing gateway > Gatekeeper >
Cisco Unified CallManager > SCCP endpoint
–
H.320 endpoint > Cisco Unified Videoconferencing Gateway > Gatekeeper >
Cisco Unified CallManager > SCCP or H.323 endpoint
The call routing for video calls functions just as the call routing for audio calls. For more information,
refer to the “Understanding Video Telephony” chapter in Cisco Unified CallManager System Guide.
Cisco Unified CallManager supports the Dynamic H.323 Addressing call routing feature. This feature
allowsH.323 endpoints with DHCP addressing to remain registered to a Gatekeeper while Cisco Unified
CallManager controls call routing. For more information, refer to the “Understanding VideoTelephony”
section in Cisco Unified CallManager System Guide. (Table 12-1 provides a link to this document.)
Gatekeeper Configuration for IP Video Telephony
Gatekeeper Configuration for IP Video Telephony
The following sections provide a general description of how gatekeepers were configured for IP Video
Telephony:
• Gatekeeper Configuration Overview, page 12-7
• Gatekeeper Call Routing, page 12-9
Gatekeeper Configuration Overview
Gatekeepers were configured in pairs to create gatekeeper clusters that provide gatekeeper-based Call
Admission Control and call routing redundancy. The endpoints must provide alternate gatekeeper
registration so that the endpoints can utilize both gatekeepers in the cluster.
Three local gatekeeper zones were created, one for Cisco Unified CallManager, one for Cisco Unified
VideoconferencingMCUs,and one for the H.323 endpoints. Zones for Cisco Unified Videoconferencing
MCUs and H.323 endpoints were configured with Invia and Outvia parameters. This configuration
allows gatekeepers to route incoming and outgoing calls to and from these zones to
Cisco Unified CallManager.
The Send Product ID And VersionID Cisco Unified CallManager service parameter must be set to True
to allow the Dynamic H.323 Addressing feature to work and to allow the gatekeeper to route incoming
or outgoing calls to the Cisco Unified CallManager in a given zone.
After the Cisco Unified CallManager service parameter Send Product ID And Version ID is set to True,
the endpoint type of Cisco Unified CallManager H.225 trunks will change to H323-GW.
The following partial output from the Show Gatekeeper Endpoints command shows a single
Cisco Unified CallManager H.225 trunk that is registered to a gatekeeper:
SJC-RFD-GK-1#show gatekeeper endpoints
GATEKEEPER ENDPOINT REGISTRATION
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Gatekeeper Configuration for IP Video Telephony
CallSignalAddr Port RASSignalAddr Port Zone Name Type Flags
--------------- ----- --------------- ----- --------- ---- -----
0.9.10.5 33209 10.9.10.5 32783 SJC-MP-GK-1 H323-GW
H323-ID: SJC-RFD-MP-1-CM1_2_3
Voice Capacity Max.= Avail.= Current.= 0
Zone prefixes were configured in the Cisco Unified CallManager zone for intercluster call flows. This
configuration is required for intercluster gatekeeper-controlled call routing. The other two zones do not
require a local zone prefix to be configured. The endpoints and MCUs are directed to these zones by the
Zone Subnet command in the gatekeeper configuration.
The Cisco Unified CallManager cluster uses the default technology prefix 1#* to register its
gatekeeper-controlled intercluster trunks in the Cisco Unified CallManager zone. Then,
Cisco Unified CallManager cluster registers a dedicated H.225 gatekeeper-controlled trunk to the MCU
zone. The trunk and the MCU zone are used for invites initiated from the MCU Conference control web
pages. Finally, the Cisco Unified CallManager cluster registers a special trunk called RasAggregator to
the H.323 endpoints zone. This trunk is dynamically created and registered as a result of the H.323
endpoints device pool configuration in Cisco Unified CallManager.
The following partial output from the Show Gatekeeper Endpoints command shows a single
Cisco Unified CallManager RasAggregator trunk that is registered to a gatekeeper:
SJC-RFD-GK-1#show gatekeeper endpoints
CallSignalAddr Port RASSignalAddr Port Zone Name Type
--------------- ----- --------------- ----- --------- ----
10.9.10.5 33206 10.9.10.5 32783 SJC-VIDEO-GK-1 H323-GW
H323-ID: RasAggregator_1#*_SJC-VIDEO-GK-1_3
Voice Capacity Max.= Avail.= Current.= 0
Chapter 12 IP Video Telephony Configuration
================================
GATEKEEPER ENDPOINT REGISTRATION
================================
A single RasAggregator trunk was created for all gatekeeper-controlled H.323 endpoints that share the
same gatekeeper zone and Cisco UnifiedCallManager group. All gatekeeper-controlledH.323 endpoints
within the same gatekeeper endpoint zone must be configured as part of the same Cisco Unified
CallManager group and device pool, otherwise Cisco Unified CallManager will register multiple
RasAggregator trunks to a single gatekeeper endpoint zone. In this situation, some incoming calls from
the H.323 endpoints will fail.
Note This configuration prevents gatekeeper-controlled H.323 endpoints from being load balanced across
multiple Cisco Unified CallManager servers by using device pools and Cisco Unified CallManager
groups. One way to accomplish such load balancing is to create multiple gatekeeper zones dedicated to
H.323 endpoints for each device pool or Cisco Unified CallManager group.
For an example of a video gatekeeper configuration, see the >>>>>>>
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Chapter 12 IP Video Telephony Configuration
Gatekeeper Call Routing
Calls are routed through the gatekeeper as follows:
• Inbound call to Cisco Unified CallManager zone from other gatekeepers—Routed to the registered
Cisco Unified CallManager Gatekeeper-controlled H.225 intercluster trunks within the Cisco
Unified CallManager zone in a Round Robin distribution algorithm using the Default Technology
prefix.
• Outbound call from Cisco Unified CallManager zone to other gatekeepers—Normal gatekeeper call
routing using location request.
• Inbound Call to MCU zone from other gatekeepers—Routed out to the registered Cisco Unified
CallManager gatekeeper-controlled H.225 intercluster trunks within the Cisco UnifiedCallManager
zone in a round robin distribution algorithm using the Default Technology prefix. Then routed by
Cisco Unified CallManager directly to the MCU via its H.323 gateway.
• Outbound call from MCU—Routed to Cisco Unified CallManager via the MCU dedicated H.225
gatekeeper-controlled trunks that are registered to the MCU zone.
• Outbound call from H.323 endpoints—Routed to Cisco Unified CallManager via RasAggregator
H.225 trunk.
• Inbound call from other Gatekeepers to H.323 endpoints—Call is first routed out the Registered
Cisco Unified CallManager gatekeeper-controlled H.225 trunk within the Cisco Unified
CallManager zone in a round robin distribution algorithm using the Default Technology prefix. It is
then routed back to the gatekeeper video endpoint zone via the RasAggregator trunk.
• Inbound call from MCUs to H.323 endpoints—Call is first routed to Cisco Unified CallManager via
the MCU dedicated H.225 gatekeeper-controlled trunks that are registered to the MCU zone. It is
then routed back to the Gatekeeper Video endpoint zone via the RasAggregator trunk.
• Inbound call from Cisco Unified Videoconferencing gateway—Call is routed to the registered
Cisco Unified CallManager gatekeeper. The gatekeeper receives an admission request from the
Cisco Unified Videoconferencinggateway, and the gatekeeper replies with an admission confirm to
send the call to Cisco Unified CallManager via the RasAggregator trunk.
Cisco Unified Videoconferencing 3540 MCU Conference Bridge Configuration for IP Video Telephony
Cisco Unified Videoconferencing 3540 MCU Conference Bridge
Configuration for IP Video Telephony
This section provides basic information about configuring the Cisco Unified Videoconferencing 3540
for IP video telephony.
For related information, refer to Administrator's Guide for Cisco Unified Videoconferencing 3511 MCU
and Cisco Unified Videoconferencing 3540 MCU Module Releases, which are available at this URL:
http://www.cisco.com/en/US/products/hw/video/ps1870/prod_maintenance_guides_list.html
The Very Large Campus Clustering over the WAN deployment model consisted of these components:
• 3544 Cisco Unified Videoconferencing chassis
• Cisco Unified Videoconferencing 3544 System 100-port MCU module
• EMP3 board
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