1-4
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 Gateway Features
Table 1-2
Cisco Gateway Feature Specifics
Feature
Cisco Unified
Videoconferencing 3527 PRI Gateway
Cisco Unified
Videoconferencing 3522 BRI Gateway
Supported ports
1 PRI ISDN port
4 BRI ISDN ports
Supported video
conferencing protocols
H.320, H.323 (using Cisco Stack v4.0)
Supported audio
codecs
The term
audio
transcoded video calls
refers to the process whereby an
audio
stream in a multimedia call can be transcoded from one codec type to another.
Basic and advanced audio coding supported codecs: G.711, G.722, G.722.1,
G.723.1, G.728
Audio Transcoding
G.711 (ISDN) < > G.723.1 (IP) for up
to 30 voice channels.
G.711 (ISDN) < > G.723.1 (IP) for up
to 8 voice channels.
G.711 (IP) < > G.728 (ISDN) for up to
20 audio transcoded video channels.
G.711 (IP) < > G.728 (ISDN) for up to
8 audio transcoded video channels.
The gateway automatically performs
A-Law G.711-to-µ-Law G.711
translation between the IP and ISDN
sides if needed.
Note
When your Cisco unit
includes both a gateway and a
MCU, G.728 transcoding is
supported on the MCU only.
Supported video
protocols
H.261, H.263, H.263+ (Annexes F, J and N), H.263++ (Annex W), H.264
Supported video
resolutions
VGA, XGA, SVGA, SIF, 4SIF, CIF, QCIF, 4CIF, 16CIF
Supported bandwidths
(Kbps)
56, 64, 112, 128, 168, 192, 224, 256,
280, 320, 336, 384, 448, 512, 672,
768, 1288, 1472, 1680 and 1920
56, 64, 112, 128, 224, 256, 336, 384
and 512
Note
Bandwidth rates of 256 Kbps and up support the G.722 audio codec.
Call handling
capabilities
For 1 x PRI T1 line:
23 ports (voice)
23 ports 1B (video and data)
11 ports 2B (video and data)
3 ports 6B (video and data)
For 1 x PRI E1 line:
30 ports (voice)
30 ports 1B (video and data)
15 ports 2B (video and data)
5 ports 6B (video and data)
For 4 x BRI lines:
8 voice-only calls or 8 video calls or
any combination of the two:
1 call x 512 Kbps
1 call x 384 Kbps +
2 calls x 256 Kbps
4 calls x 128 Kbps
8 calls x 64 Kbps
Line quality
Supports line echo cancellation, H.323 Fast Start and DTMF detection for
voice and video calls.
