Table of Contents
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About Gateway Features
Table 1-1
Gateway Feature Summary (continued)
Feature
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
Gateway Feature Specifics
Feature
Supported ports
Supported video
conferencing protocols
4
SCOPIA 400/1000 Gateway User Guide
Description
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.
Table 1-2
lists features for specific
Gateway P20 SP
2 PRI ISDN ports
H.320, H.323 (using RADVISION Stack v4.0)
Gateways.
RADVISION
Gateway S40 SP
4 serial ports
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