Cisco Systems 3545 Serial, 3545 PRI manual Feature, Description, Dual video

Chapter 1 Functionality

About Gateway Features

Table 1-1	Gateway Feature Summary (continued)
Feature		Description
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		The gateway features ISDN rollover. In this feature, the gateway sends a “busy
Videoconferencing 3545 PRI Gateway		out” channel request to the PSTN switch when the current PRI connection is left
only)		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		The gateway provides support for Network Specific Facility Information
Cisco Unified Videoconferencing 3545		Elements (NSF IEs) which enable system administrators to specify to service
PRI Gateway only)		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.
Encryption support		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.
H.243 Conference Control support		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.
Peer-to-peer connectivity		The gateway supports connectivity to the IP network through a gatekeeper, or
		directly to a peer device such as Cisco Unified Communications Manager.
IP network connections		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 on page 1-4lists features for specific Cisco gateways.

Installation and Upgrade Guide for Cisco Unified Videoconferencing 3545 PRI Gateway and 3545 Serial Gateway Release 5.6

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