Cisco Unified Survivable Remote Site Telephony

About Cisco Unified SRST 4.3

Documentation

See Cisco Unified SRST.

NOTE: Cisco Unified SRST 7.0 includes the same features as Cisco Unified SRST 4.3, which is renumbered to 7.0 to align with Cisco Unified Communications versions.

Secure SRST

See Setting Up Secure SRST.  Cisco Unified Communications Manager 4.1(2) or a later version  is required for secure
Cisco Unified SRST.

Secure SRST Specifications

See the  Media and Signaling Authentication and Encryption Feature for Cisco IOS MGCP Gateways for complete specifications.

Cisco IOS Compatibility

To see a list of Cisco IOS releases that support Cisco Unified SRST, see the Cisco Unifed CME Compatibility Matrix. Cisco Unified SRST is compatible with the same Cisco IOS releases as Cisco Unified CME.

Downloads

To download Cisco Unified SRST software, go to Technical Support Software Download for Cisco Unified CME and Cisco Unified SRST.

Cisco Unified SRST supports Cisco Unified Communications Manager firmware. For more information, see the CiscoUnified Communications Manager Compatibility Matrix.

You can download firmware files from Technical Support Software Center for Voice Software.

DDTS Information

To obtain the latest Cisco Unified SRST DDTS information, go to Bug Toolkit and search, by product, under Cisco Survivable Remote Site Telephony.

Cisco Unified IP Phone Support

Device Type

SCCP Firmware Filename

SIP Firmware Filename

Comments

CiscoATA-186 CiscoATA-188

ATA030203SCCP051201A

N/A

Cisco IP Communicator

2.1.3.0

N/A

Cisco VG224

12.4(19.9)PI8

N/A

Cisco Unified IP Phone 3911

N/A

SIP3951.8-1-1b

Cisco Unified IP Phone 7902G
Cisco Unified IP Phone 7905G
Cisco Unified Phone 7912G

CP7902080002SCCP060817A

CP7905080001SIP060412A

Cisco Unified IP Phone 7906G
Cisco Unified IP Phone 7911G

SCCP11.8-3-3S

SIP11.8-3-1S

Cisco Unified IP Phone 7910

P00405000700

N/A

Cisco Unified IP Phone 7912

CP7912080003SCCP070409A

CP7912080001SIP060412A

Cisco Unified IP Phone 7914 Expansion Module

S00105000300

N/A

Cisco Unified IP Phone 7915 ** Expansion Module

B015-1-0-2

N/A

Cisco Unified IP Phone 7916 ** Expansion Module

B016-1-0-2

N/A

Cisco Unified Wireless IP Phone 7920

cmterm_7920.4.0-03-02

N/A

Cisco Unified Wireless IP Phone 7921

CP7921G-1.1.1

N/A

Cisco Unified IP Phone 7931

SCCP31.8-3-3S

N/A

Cisco Unified IP Conference Station 7935

P00503021700

N/A

Cisco Unified IP Conference Station 7936

cmterm_7936.3-3-14-0

N/A

Cisco Unified IP Conference Station 7937

See software download site for latest firmware version

N/A

Cisco Unified IP Phone 7940G Cisco Unified IP Phone 7960G

P00308000900

P0S3-08-8-00

Cisco Unified IP Phone 7941G, 7941G-GE*
Cisco Unified IP Phone 7961G, 7961G-GE*

SCCP41.8-3-3S

SIP41.8-3-3S

Cisco Unified IP Phone 7942G
Cisco Unified IP Phone 7962G

SCCP42.8-3-3S

SIP42.8-3-3S

Cisco Unified IP Phone 7945G
Cisco Unified IP Phone 7965G

SCCP45.8-3-3S

SIP45.8-3-3S

Cisco Unified IP Phone 7970G
Cisco Unified IP Phone 7971G-GE

SCCP70.8-3-3S

SIP70.8-3-3S

Cisco Unified IP Phone 7975

SCCP75.8-3-3S

SIP75.8-3-3S

Cisco Unified IP Phone 7985G

cmterm_7985.4-1-5-0

N/A

*These phones are supported beginning in Cisco Unified SRST 4.1 and Cisco IOS Release 12.4(15)T

** To support 7915/7916 extenstion modules, the IP phones need to have firmware 8-3-5 onward. (CSCsl88522), the fix will be availble with 8-4-1 firmware.

Supported Platforms and Memory Specifications: SCCP/SIP IP Phones*

Cisco Platform

Maximum Total IP Phones**

Maximum SCCP/SIP IP Phones

Maximum Total Ephone-dns or Virtual Ports

Recommended DRAM

Recommended Flash Memory

Cisco 880 SRST ****

4

4

50

512

256

Cisco 1861

15

15

48

256

128

Cisco 2801

25

25

256

256

128

Cisco 2811

35

35

144

256

128

Cisco 2821

50

50

192

256

128

Cisco 2851

100

100

288

256

128

Cisco 3825

350

350

960

512

128

Cisco 3845

730

730

960

512

128

Catalyst 6500 CMM***

480

480

960

256

128

* Memory recommendations and maximum numbers of IP phones are for common Cisco SRST configurations only. Systems with large numbers of phones and complex configurations may not work on all platforms and can require additional memory or a higher performance platform.

** The Maximum Total IP Phones can be split between SCCP and SIP phones as long as the maximum total of IP phones are reached.

*** Cisco Caalyst 6500 CMM supports Cisco Unified SRST 4.0 with Cisco IOS Release 12.4 and supports Cisco Unified SRST 2.1 with Cisco IOS Release 12.2(13)ZC.

**** SRST 880 is natively supported by CUCM 6.13 and 7.1

To get the same number of SIP IP phones support as SCCP IP Phones, SRST 4.1 in 12.4(15)T is required

Compatible Voice Products

Product Name

Version(s)

Comments

Cisco CallManager, SCCP phones only

3.3, 3.2

Cisco SRST is not dependent on Cisco CallManager versions, but phone loads.

Cisco CallManager, SCCP phones only

4.0/4.0 SR1

SRST Versions 3.1 and 3.2 were tested with cmterm-7940-7960-sccp.6-0-1.exe and 6-0.2.exe.

Cisco CallManager, SCCP phones only

4.1.3 SR2

SRST Version 3.4 was tested with the following IP phones: Cisco 7970G, Cisco 7960G, and Cisco 7912G.

Cisco CallManager, SCCP and SIP phones

5.x

See above phone firmware vs phont type table

Cisco Unified Communication Manager, SCCP and SIP phones

6.x

See above phone firmware vs phone type table

Cisco Unified Communication Manager, SCCP and SIP phones

7.0

See avove phone firmware vs phone type table