What is SRST in CUCM?
What is SRST in CUCM?
Survivable Remote Site Telephony (SRST) is a Cisco Unified Communications Manager (CUCM) call processing backup mechanism that allows Cisco IP phones to register to a Cisco router.
What is SRST used for?
Cisco Unified SRST enables routers to provide basic call-handling support for Cisco Unified IP Phones when they lose connection to remote primary, secondary, and tertiary CUCM servers or when the WAN connection is down.
What is Cisco CallManager Express?
Cisco Call Manager Express (CME) is an enhanced IP telephony solution that is integrated into Cisco IOS. It is an ideal solution for small business customers to efficiently use their existing IP data connectivity to incorporate the deployment of voice and IP telephony.
How do I find my Srst license on my router?
- Purpose. The purpose of this document is to explain how license activation works on a Cisco ISR-G2 (19xx/29xx/39xx) router.
- Go to global configuration mode.
- Issue the telephony-service command.
- Issue the max-dn and max-ephone commands.
- The output should show the License State as Active, In Use.
What is SRST configuration in Cisco?
Cisco SRST Configuration. Survivable Remote Site Telephony (SRST) – It is a call processing backup mechanism that allows Cisco IP phones to register to a Cisco router locally during a WAN Failure.
What is SRST fallback mode in VoIP?
In this case, you VoIP calls inter-clusters will not work as the WAN link is down but however calls made to the local site will work as the phones will be registered to the local router. As the Phone will register to the local site, the mode is called as SRST Fallback Mode.
How do I configure SRST in CUCM?
Step 1. Go to CUCM Administration GUI > System > SRST, click Add New, and enter the required details about the remote site gateway, as shown in Figure 5-5. Ensure that the SRST gateway’s hostname/IP address is defined and the correct protocol (SCCP/SIP) port is chosen.