Cisco Unified Survivable Remote Site Telephony

Table Of Contents

Cisco Unified Survivable Remote Site Telephony (SRST) 4.0
Supported Firmware, Platforms, Memory, and Voice Products

Cisco Unified Survivable Remote Site Telephony (SRST) 4.0
Supported Firmware, Platforms, Memory, and Voice Products

About Cisco Unified SRST 4.0
Documentation	See Cisco Unified SRST.
Secure SRST	See Setting Up Secure SRST. At minimum, Cisco Unified CallManager Version 4.1(2) is required for secure SRST.
Secure SRST Specifications	See the Media and Signaling Authentication and Encryption Feature for Cisco IOS MGCP Gateways for complete specifications.
Cisco IOS Compatibility	Other Cisco IOS software releases may inherit Cisco Unified SRST 4.0. To get a list of Cisco IOS software releases that support Cisco Unified SRST 4.0, go to Feature Navigator.
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 CallManager firmware. For more information, see the Cisco Unified CallManager 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	ATA030100SCCP040211A.zup	—	—
Cisco IP Communicator	Cisco IP Communicator v 2.0(1) and higher supported	—	—
Cisco VG224	Version 12.4(2)T verified with SCCP analog ports	—	—
Cisco Unified IP Phone 7902G Cisco Unified IP Phone 7905G Cisco Unified Phone 7912G	CP7902060000SCCP050124A.sbin	—	—
Cisco Unified IP Phone 7910	P00403020214.bin	—	—
Cisco Unified IP Phone 7914 Expansion Module	S00104000100.sbn	—	—
Cisco Unified Wireless IP Phone 7920	cmterm_7920.3.3-01-08.bin	—	—
Cisco Unified IP Conference Station 7935	P00503010100.bin	—	—
Cisco Unified IP Conference Station 7936	cmterm_7936.3-3-5-0.bin	—	—
Cisco Unified IP Phone 7940G Cisco Unified IP Phone 7960G	P00307020200.bin	P0S3-07-5-00.zip	—
Cisco Unified IP Phone 7941G, 7941G-GE* Cisco Unified IP Phone 7961G, 7961G-GE*	TERM41.7-0-2-0S	—	—
Cisco Unified IP Phone 7970G Cisco Unified IP Phone 7971G-GE	TERM70.7-0-1-0SR1s.loads, secure SRST TERM70.6-0-2SR1-0	—	—
*These phones are supported with SRST 3.3, 12.4 mainline.

Supported Platforms and Memory Specifications: SCCP IP Phones*
Cisco Platform	Maximum Total IP Phones	Maximum SCCP IP Phones	Maximum Total Ephone-dns or Virtual Ports	Recommended DRAM	Recommended Flash Memory
Cisco 1751-V	24	24	144	128	32
Cisco 1760, Cisco 1760-V	24	24	144	128	32
Cisco 261xXM, 262xXM	36	36	144	128	48
Cisco 2650XM, 2651XMx	48	48	192	128	48
Cisco 2691	72	72	288	256	64
Cisco 2801	24	24	120	128	64
Cisco 2811	36	36	144	256	64
Cisco 2821	48	48	192	256	64
Cisco 2851	96	96	288	256	64
Cisco 3725	144	144	960	256	64
Cisco 3745	480	480	960	256	64
Cisco 3825	336	336	960	256	64
Cisco 3845	720	720	960	256	64
Catalyst 6500 CMM**	480	480	800	256	32
* 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. ** Cat 6500 CMM supports SRST 3.2 in 12.3(8)XY and supports SRST 2.1 with 12.2(13)ZC.

Supported Platforms and Memory Specifications: SIP IP Phones*
Cisco Platform	Maximum Total IP Phones	Maximum SIP IP Phones	Maximum Total Ephone-dns or Virtual Ports	Recommended DRAM	Recommended Flash Memory
Cisco 1751-V	24	24	144	128	32
Cisco 1760, Cisco 1760-V	24	24	144	128	32
Cisco 261xXM, 262xXM	36	24	72	128	48
Cisco 2650XM, 2651XMx	48	36	108	128	48
Cisco 2691	72	72	288	256	64
Cisco 2801	24	24	72	128	64
Cisco 2811	36	36	144	256	64
Cisco 2821	48	48	192	256	64
Cisco 2851	96	96	288	256	64
Cisco 3725	144	144	500	256	64
Cisco 3745	480	192	500	256	64
Cisco 3825	336	168	500	256	64
Cisco 3845	720	480	720	256	64
Catalyst 6500 CMM**	480	NA	NA	256	32
* 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. ** Cat 6500 CMM supports SRST 3.2 in 12.3(8)XY and supports SRST 2.1 with 12.2(13)ZC.

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.