Set up VG224 as SRST for analog phones

[shyam2014]

How to enable the SRST mode for analog phones in VG224?

The main router with E1 is connected to VG224 via L3 switch

Main router has both SIP and SCCP SRST enabled

This is the current config done for SRST

sccp local FastEthernet0/0
sccp ccm X.X.X.X identifier 23<--- CALL MANAGER ip
sccp ccm X.X.X.X identifier 22<---MAIN GATEWAY WITH E1 ip
sccp
!
sccp ccm group 1
 associate ccm 23 priority 1
 associate ccm 22 priority 2
 switchback method graceful
!

Is this correct config?

[Chris Deren]

No, you don't need to define the SRST under the sccp ccm on the GW, since these are SCCP ports you simply need to assign the proper device pool with SRST reference to the SCCP ports in CUCM.

[shyam2014]

The device pool that is assigned to analog phones contains the main router ip address for both IP Address and SIP Network/IP Address.

Not sure what am I missing here?

[Dennis Mink]

Have you actually configured your "main gateway" as an srst router?

and when you test fail over do you see any attempt to register at all?  (use: debug ephone)

let us know

[shyam2014]

Attach is the debug log,

The main GW is setup as SRST. SIP and digital SCCP phones are working on SRST mode but analog sccp phones are not working which is connected to the GW. They are getting busy tone

[shyam2014]

Found that IOS version 12.4 was not supporting SRST to work upgraded the IOS to latest 15.1 and it started working.

[kelen12345]

When vg224 Analogue  speaks to your srst router ( in the event of  CUCM communication cut off due to wan link failure )  those analogue phones connected to VG224 can be reached from outside ?  

How does the srst router know the individual analogue port destination number of VG224 ports.  Is there any additional configuration like Fall-back DN required  ( in the VG224 )  inorder for incoming calls to work while in srst ?

[Chris Deren]

This depends on protocol used to control the analog ports. If using SCCP it works just like with phones as the ports get SRST reference from CUCM configuration and register with SRST. If SIP or H323 then you need to have adequate backup dial-peers to point to the SRST GW.

[shyam2014]

Chris,

Just wanted to male sure whether SRST for analog device works if the analog VG224 is connected with main router via a L3 switch.

Do you want me to remove this following configs from VG224

sccp local FastEthernet0/0
sccp ccm X.X.X.X identifier 23<--- CALL MANAGER ip
sccp ccm X.X.X.X identifier 22<---MAIN GATEWAY WITH E1 ip
sccp
!
sccp ccm group 1
 associate ccm 23 priority 1
 associate ccm 22 priority 2
 switchback method graceful
!

If I remove these configs will the analog phone gonna register with WAN connected?