Specifications

Cisco Unified Survivable Remote Site Telephony Feature Roadmap

Feature Roadmap

Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide

• System Log Messages for Phone Registrations

• Three-Party G.711 Ad Hoc Conferencing

• Support for Cisco VG248 Analog Phone Gateway Version 1.2(1) and Higher

Additional Language Options for IP Phone Display

Displays for the Cisco Unified Unified IP Phone 7940G and Cisco Unified Unified IP Phone 7960G can

be configured with additional ISO-3166 codes for Denmark, The Netherlands, Norway, and Sweden.

Note This feature is available only for Cisco SRST running under Cisco Unified CallManager V3.2.

Consultative Call Transfer and Forward Using H.450.2 and H.450.3

Cisco SRST V1.0, Cisco SRST V2.0, and Cisco SRST V2.1 allow blind call transfers and blind call

forwarding. Blind calls do not give transferring and forwarding parties the ability to announce or consult

with destination parties. These three versions of Cisco SRST use a Cisco SRST proprietary mechanism

to perform blind transfers. Cisco SRST V3.0 adds the ability to perform call transfers with consultation

using the ITU-T H.450.2 (H.450.2) standard and call forwarding using the ITU-T H.450.3 (H.450.3)

standard for H.323 calls.

Cisco SRST V3.0 provides support for IP phones to initiate call transfer and forwarding with H.450.2

and H.450.3 by using the default session application. The built-in H.450.2 and H.450.3 support that is

provided by the default session application applies to call transfers and call forwarding initiated by IP

phones, regardless of PSTN interface type.

For consultative transfer to be available, the Cisco SRST router must be configured with the dual-line

mode. See the “Configuring Dual-Line Phones” section on page 58.

Note All voice gateway routers in the VoIP network must support H.450. For H.450 support, routers with

Cisco SRST must run either Cisco SRST V3.0 and higher versions or Cisco IOS Release 12.2(15)ZJ and

later releases. Routers without Cisco SRST must run either Cisco SRST V2.1 and higher versions or

Cisco IOS Release 12.2(11)YT and later releases.

For more information about the default session application, see the Default Session Application

Enhancements document.

For configuration information, see the “Enabling Consultative Call Transfer and Forward Using H.450.2

and H.450.3 with Cisco SRST 3.0” section on page 82.

Customized System Message for Cisco Unified IP Phones

The display message that appears on Cisco Unified IP Phone 7905G, Cisco Unified IP Phone 7940G,

Cisco Unified IP Phone 7960G, and Cisco Unified IP Phone 7910 units when they are in fallback mode

can be customized. The new system message command allows you to edit these display messages on a

per-router basis. The custom system message feature supports English only.

For further information, see the “Configuring Customized System Messages for Cisco Unified IP

Phones” section on page 55.