Cisco 3522 BRI - Manual (Page 13)

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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3522 BRI Gateway and 3527 PRI Gateway Releases 5.6 and 5.7
OL-17010-01
Chapter 1 Functionality
About Cisco Unified Videoconferencing 3500 Gateway Applications and Topologies
About Point-to-Point Conferencing
The Cisco BRI gateway enables direct video, voice, and data communication between an H.320 (ISDN)
terminal and H.323 (IP) terminals at bandwidths of up to 512 Kbps (4 BRI lines) using bonding mode 1
(see
Figure 1-2 ).
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 and BRI gateway enable 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
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ISDN