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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3545 PRI Gateway and 3545 Serial Gateway Release 5.5
OL-14912-01
Chapter 1 Functionality
About Cisco Unified Videoconferencing 3545 Gateway Applications and Topologies
About Point-to-Point Conferencing
The Cisco PRI gateway enables direct video, voice, and data communication between an H.320 (ISDN)
terminal and H.323 (IP) terminals at bandwidths of up to 1472 Kbps (23B bonding for T1) and up to
1920 Kbps (30B bonding for E1).
Figure 1-2 Point-to-Point Conferencing through the Gateway
About Multipoint Conferencing
Together with the Cisco MCU, the Cisco PRI gateway enables H.320 ISDN terminals to participate in a
mixed ISDN-IP multipoint multimedia conference with IP network endpoints (see Figure 1-3).
For example, when an H.320 ISDN terminal wants to participate in a multipoint conference with H.323
IP endpoints, the H.320 ISDN terminal can either join the multipoint conference by dialing to the
gateway, or be invited into the conference by one of the participating IP endpoints. In either case, the
gateway connects the ISDN terminal to the Cisco MCU, enabling it to participate in the multipoint
conference.
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H.323
terminal
H.323
terminal
H.323
endpoint
Cisco
chassis/unit
with serial
gateway
IP network
ISDN