Query about SRST license

[baskaranm]

HI

we have 3845 model voice  router.

IOS: 

c3845-adventerprisek9-mz.124-24.T6.bin

I want to know do we need SRST license separately or IOS version will support SRST.

[Ayodeji Okanlawon]

SRST feature is embedded in IOS. However you still need SRST license. SRST license is honour based, hence you must purchase one before using the feature

[Aman Soi]

[+5] for AOK.

you can refer the ordering guide which says 

http://www.cisco.com/web/partners/downloads/partner/WWChannels/technology/ipc/downloads/srst_ordering_guide.pdf

a. Cisco Unified Survivable Remote Site Telephony is a feature in Cisco IOS® Software that operates on specific  routers.

b. Each router operating Cisco Unified SRST requires a feature license when deployed in a production 
environment.

The following components are required for a complete Cisco Unified Survivable Remote Site Telephony (SRST) IP  Telephony Solution:
● Cisco Unified SRST supported router running a supported version of Cisco IOS Software
● Cisco Unified Survivable Remote Site Telephony Feature License for the number of phones to be deployed
● Voice modules for connectivity to the public switched telephone network (PSTN) or host private branch exchange (PBX)
● Digital-signal-processor (DSP) resources for PSTN-to-IP connectivity
● Optional Cisco Unity Express voicemail module
● Data switching using in-the-router switching with high-speed WAN interface card (HWIC) or network module (NM) or Cisco Catalyst® switch
● Cisco SMARTnet® support for the router hardware

regds,

aman