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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3522 BRI Gateway and 3527 PRI Gateway Release 5.6
OL-17010-01
Chapter 1 Functionality
About Cisco Unified Videoconferencing 3500 Gateway Functionality
About Cisco Unified Videoconferencing 3500 Gateway
Functionality
• About PRI Gateway Call Handling Capacity, page 1-11
• About BRI Gateway Call handling Capacity, page 1-11
• About Gateway Call Bandwidth Overhead, page 1-12
• About Peer-to-Peer Connectivity, page 1-12
About PRI Gateway Call Handling Capacity
Table 1-3 lists the maximum call handling capacity of the PRI gateway for different types of calls.
Note Enabling ISDN-to-IP DTMF detection in the PRI gateway for video calls reduces the number of
supported calls by half.
About BRI Gateway Call handling Capacity
Table 1-4 lists the maximum call handling capacity of the BRI gateway for four BRI lines, eight
voice-only calls, or eight video calls, or any combination of the two.
Ta b l e 1-3 PRI Gateway Call Handling Capacity
Call Type Maximum Number of
Calls Using 1 x E1 PRI
Line
Maximum Number of
Calls Using 1 X T1 PRI
Line
voice (64 Kbps) 30 23
2B video (128 Kbps) 15 11
6B video (384 Kbps) 5 3
12B video (768 Kbps) 2 1
Ta b l e 1-4 BRI Gateway Call Handling Capacity
Number of Calls Capacity
1 384 Kbps+ or 412 Kbps
2 256 Kbps
4 128 Kbps
8 64 Kbps