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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3522 BRI Gateway and 3527 PRI Gateway Release 5.5
OL-14910-01
Chapter 1 Functionality
About Cisco Unified Videoconferencing 3500 Gateway Applications and Topologies
About Cisco Unified Videoconferencing 3500 Gateway
Applications and Topologies
The Cisco Unified Videoconferencing 3500 Gateway supports multimedia conferencing by translating
between H.323 and H.320 protocols. Examples of network applications that use the gateway include:
• Multimedia conferencing (see the “About Multimedia Conferencing” section on page 1-6)
• Point-to-Point conferencing (see the “About Point-to-Point Conferencing” section on page 1-7)
• Multipoint conferencing (see the “About Multipoint Conferencing” section on page 1-8)
• IP networking (see the “About Gateway IP Network Connections” section on page 1-8)
• ISDN networking (see the “About Gateway ISDN Network Connections” section on page 1-8)
About Multimedia Conferencing
The Cisco PRI gateway and BRI gateway enable H.323 endpoints on the IP network to communicate
with an H.320 terminal, an ISDN phone, or a regular phone on a circuit-switched public network without
having to connect directly to these networks. The gateway allows all IP network terminals to support
video conferences without connecting every desktop computer to an ISDN line (see Figure 1-1).
Bonding calls Internal Imux providing calls at 128
Kbps (2B) up to full PRI of
1472 Kbps (23B) for T1 and up to full
PRI of 1920 Kbps (30B) for E1 using
bonding mode 1.
Internal Imux providing calls at 128
Kbps (2B) up to 512 Kbps (8B) using
bonding mode 1.
Parallel dialing for bonded calls. Parallel dialing for bonded calls.
Internal IVR capacity 30 simultaneous calls 8 simultaneous calls
Table 1-2 Cisco Gateway Feature Specifics (continued)
Feature Cisco Unified
Videoconferencing 3527 PRI Gateway
Cisco Unified
Videoconferencing 3522 BRI Gateway