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 the SRST in VOIP?

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 SRST mode Cisco?

SRST is an IOS feature that enables routers to provide call-handling support for Cisco IP Phones if they lose their connection to a remote Primary CUCM which can occur if the WAN connection to the main site is down. When CUCME provides Cisco Unified SRST functionality, provisioning of phones is automatic.

What is SRST configuration?

Pasha Teplitsky SIP, Unified Communications. Cisco SIP SRST Configuration is the process of providing backup to external SIP Call control (IP-PBX) through the provision of the basic registrar and re-direct server or back-to-back user agent (B2BUA) services.

How do I check my SRST status?

To check the status of connection with cucm and the current status, use the below command: show ccm-manager fallback-mgcp —Displays a list of Cisco CallManager servers and their current status and availability.

How do I enable SRST on Cisco router?

1. Cisco Unified SRST Configuration in CUCM

1. Follow the procedure to configure SRST in CUCM at the Main Site.
2. CUCM Device Pool Configuration.
3. Follow these steps to configure Cisco Unified SRST on a Cisco IOS gateway at the Remote Site.
4. Step1: Enter call-manager-fallback configuration mode to activate SRST.

How do I check my Srst status?

How do you test Srst?

SRST testing

1. Create an ACL that blocks the remote router and a local phone(s) from reaching the Call Manager servers.
2. Check how long it takes for the router PSTN ports to register to the router.
3. Check how long it takes for the phone(s) to register to the router.
4. Dial-plan (off-net and on-net calls). ( On-net only ).

How do you test SRST?

How do I find my Srst license on my router?

1. Purpose. The purpose of this document is to explain how license activation works on a Cisco ISR-G2 (19xx/29xx/39xx) router.
2. Go to global configuration mode.
3. Issue the telephony-service command.
4. Issue the max-dn and max-ephone commands.
5. The output should show the License State as Active, In Use.

How do I enable Srst on Cisco router?

What is Cisco CME?

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 open an OVA file in VMware?

To convert an OVA file to be used with VMware Workstation is as easy as exporting the VM to an OVA file. Then, in VMware, use the File > Open menu to browse for the OVA file, and then follow the instructions in VMware Workstation to set up the new VM.

What is the SRST reference in CUCM?

The IOS router must be defined as an SRST reference in CUCM. Then this SRST reference consecutively needs to be added to the appropriate device pool to enable the phones at remote sites to leverage SRST.

How do I configure an SRST reference in a device pool?

To configure an SRST reference and add it to a device pool, follow these steps: 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.

Why is my SRST gateway not working with CUCM?

Ensure that the SRST gateway’s hostname/IP address is defined and the correct protocol (SCCP/SIP) port is chosen. If the gateway is referenced by hostname, be sure that CUCM can resolve the name and has DNS servers configured.