Cisco 3521 Administrator's Manual page 28

About Cisco IPVC 3500 Series Gateway Features
Table 1-7
Feature
ISDN rollover
Network Specific Facility
ISDN connection failure
Downspeeding
Multiple trap server support
H.239 support
H.235 encryption for H.323 calls
Administrator's Guide for Cisco IPVC 3521 BRI Gateway, Cisco IPVC 3526 PRI Gateway, and Cisco IPVC 3540 PRI Gateway
1-12
Cisco IPVC 3500 Series Gateway Feature Summary
Chapter 1 Overview of the Cisco IPVC 3500 Series Gateway
Description
The Cisco IPVC 3500 Series 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.
This feature is supported on the
Note
Cisco IPVC 3500 PRI Gateways only.
The Cisco IPVC 3500 Series Gateway provides
support for Network Specific Facility Information
Elements (NSF IEs) enables system
administrators to specify to service providers the
equipment, service, or network through which
they want a call routed.
This feature is supported on the
Note
Cisco IPVC 3500 PRI Gateways only.
The Cisco IPVC 3500 Series 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 Cisco IPVC 3500 Series Gateway features In
downspeeding functionality. In the downspeeding
feature, the Cisco IPVC 3500 Series 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 Cisco IPVC 3500 Series Gateway supports
up to three SNMP trap servers.
The Cisco IPVC 3500 Series Gateway supports
H.239 in ISDN-to-IP calls and in IP-to-ISDN
calls.
The Cisco IPVC 3500 Series Gateway supports
H.325-compliant encryption for calls over IP
networks.
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