Cisco 545 Serial - Manual (Page 9)

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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 Gateway Features
Access control The gateway features password-controlled access to the gateway interface.
Up to ten different administrator access profiles can be defined for the
gateway.
DTMF translation The gateway supports translation between in-band Dual Tone
Multi-Frequency (DTMF) signals (on the ISDN side) and out-of-band
H.245 messages (on the IP side). DTMF translation occurs for voice and
video calls.
Dual video 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.
Hot swap The gateway features hot swap functionality that you can use to remove
and replace gateway cards under power.
Conceal caller ID 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.
H.323 fast start The gateway H.323 fast start feature enables endpoints to join a voice
conference in the gateway more quickly.
ISDN rollover
(available in Cisco
Unified
Videoconferencing
3545 PRI Gateway
only) 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.
Network Specific
Facility (available in
Cisco Unified
Videoconferencing
3545 PRI Gateway
only) 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.
ISDN connection
failure 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.
Downspeeding 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.
Multiple trap server
support The gateway supports up to three SNMP trap servers.
H.239 support The gateway supports the H.239 protocol in ISDN-to-IP calls and in
IP-to-ISDN calls.
Table 1-1 Gateway Feature Summary (continued)
Feature Description