Cisco 3545 PRI Installation And Upgrade Manual page 9

Chapter 1 Functionality
Table 1-1 Gateway Feature Summary (continued)
Feature
Dual video
Hot swap
Conceal caller ID
H.323 fast start
ISDN rollover (available in Cisco Unified
Videoconferencing 3545 PRI Gateway
only)
Network Specific Facility (available in
Cisco Unified Videoconferencing 3545
PRI Gateway only)
ISDN connection failure
Downspeeding
Multiple trap server support
H.239 support
Encryption support
H.243 Conference Control support
Peer-to-peer connectivity
IP network connections
Table 1-2 on page 1-4
Installation and Upgrade Guide for Cisco Unified Videoconferencing 3545 PRI Gateway and 3545 Serial Gateway Releases 5.6 and 5.7
OL-17011-01
Description
The gateway supports H.239 standards-based dual video and TANDBERG
DuoVideo technology. Dual video streams enable a screen to carry video images
from one source while simultaneously displaying images from a second source.
The gateway features hot swap functionality that you can use to remove and
replace gateway cards under power.
The gateway supports a conceal caller ID feature that instructs the gatekeeper to
conceal the identity of the calling endpoint on the IP or ISDN network, whether
the presentation restricted feature is enabled or not.
The gateway H.323 fast start feature enables endpoints to join a voice conference
in the gateway more quickly.
The gateway features ISDN rollover. In this feature, the gateway sends a "busy
out" channel request to the PSTN switch when the current PRI connection is left
with less than a predefined number of available B channels. The PSTN switch
"rolls over" to the next available gateway.
The gateway provides support for Network Specific Facility Information
Elements (NSF IEs) which enable system administrators to specify to service
providers the equipment, service, or network through which they want a call
routed.
The gateway responds to ISDN connection failure events, by unregistering from
its gatekeeper. The gatekeeper is forced to send new IP-to-ISDN calls through a
different gateway, thus ensuring high call completion rates. The gateway
re-registers to the gatekeeper when the ISDN connection is restored.
The gateway features downspeeding functionality. In the downspeeding feature,
the gateway attempts to reconnect a disconnected video call either at a lower
bandwidth or as a voice call. Downspeeding contributes to a higher percentage of
call completion on the network. The gateway supports downspeeding at call setup
and in mid-call.
The gateway supports up to three SNMP trap servers.
The gateway supports the H.239 protocol in ISDN-to-IP calls and in IP-to-ISDN
calls.
The gateway supports H.235-compliant AES 128 encryption for calls over IP
networks, and H.233 and H.234-compliant AES 128 encryption for calls over
ISDN networks.
The gateway supports the H.243 protocol in ISDN-to-IP calls and in IP-to-ISDN
calls. The gateway identifies the protocol version that an IP endpoint uses and
sends H.239 capabilities only to those endpoints working with protocol version
4.0 or later.
The gateway supports connectivity to the IP network through a gatekeeper, or
directly to a peer device such as Cisco Unified Communications Manager.
The gateway has 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.
lists features for specific Cisco gateways.
About Gateway Features
1-3