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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
Figure 1-3 Mixed ISDN-IP Multipoint Multimedia Conference
About Gateway IP Network Connections
The Cisco PRI gateway features one 10/100Base-T Ethernet IP port (on the front panel) and connects to
an IP segment through a direct connection to a network switch.
About Gateway ISDN Network Connections
The Cisco PRI gateway features configurable E1/T1 PRI ISDN connections. When configured as an E1
connection, each port provides 30 B channels and one D signaling channel. When configured as a T1
connection, each port provides 23 B channels and one D signaling channel. The type of line available
depends on your local ISDN provider. You configure the gateway PRI port to an E1 or T1 interface
accordingly. In addition, you can choose to activate only specific channels by using fractional channel
selection.
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