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gsidhu
Participant

SIP configuration in SRST ver 15.1 (3T)

Hi

Customer has SCCP phones and 8961 SIP phones.

I'm testing SRST today on a Cisco 3925 running the very latest IOS (version c3900-universalk9-mz.SPA.151-3.T.bin

I noticed that this version does not support all of the commands/syntax provided in the documentation.

Please could somebody have a look at the configuration below and let me know if it should work or if there is anything that I need to add.

I've not worked with SIP phones in SRST mode so I would really appreciate a response back today (hopefully before the testing!).

Thanks

voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip

!

voice register pool  10
id network 172.26.10.0 mask 255.255.0.0
dtmf-relay rtp-nte cisco-rtp sip-notify
codec g711ulaw
no vad
!
voice register pool  11
id network 172.26.11.0 mask 255.255.0.0
dtmf-relay rtp-nte cisco-rtp sip-notify
codec g711ulaw
no vad
!

sip-ua
registrar ipv4:172.26.10.240 expires 600

(172.26.10.240 is the SRST gateway IP address).

On UCM SRST reference configuration for gateway

SIP Network/IP Address 172.26.10.240

Required Field 5060

14 REPLIES 14
gthakkar
Beginner

HI

Any one tested this configuration?

Thanks

I have got this working

There is an error in the subnet mask under both voice register pools and under

voice service voip you also need to add:

sip

  registrar server expires max 600 min 60.

Here is the amended template:

voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip

sip

  registrar server expires max 600 min 60

!

voice register pool  10
id network 172.26.10.0 mask 255.255.255.0
dtmf-relay rtp-nte cisco-rtp sip-notify
codec g711ulaw
no vad
!
voice register pool  11
id network 172.26.11.0 mask 255.255.255.0
dtmf-relay rtp-nte cisco-rtp sip-notify
codec g711ulaw
no vad
!

sip-ua
registrar ipv4:172.26.10.240 expires 600

(172.26.10.240 is the SRST gateway IP address).

Don't forget on UCM SRST reference configuration for gateway:

On UCM SRST reference configuration for gateway

SIP Network/IP Address 172.26.10.240

5060

Please rate helpful posts.

So the 8961 SIP Phones ended up working in SRST mode ??
Thanks

Yes it did.....

Thanks for your reply :)
Can you also state the Phone loads versions used ?

Thanks in advance
 

It would have been the default phone load provided with CUCM version 8.0.2.40000-1/UCOS version 8.0(2c)

This was more than 3 years ago and unfortunately I don't have a record of the phone load version provided with this CUCM version.

 

Note you don't need to specify phone load for SRST; this only applies to CME.

For example...

telephony-service
 srst mode auto-provision none
 srst dn line-mode dual
 max-ephones 265
 max-dn 600
 ip source-address 172.26.9.100 port 2000
 max-redirect 20
 no service directed-pickup
 timeouts interdigit 5
 system message Backup Phone System
 time-zone 13
 time-format 24
 dialplan-pattern 1 +1312822.... extension-length 4 demote
 max-conferences 2 gain -6
 call-forward pattern .T
 moh music-on-hold.au
 multicast moh 239.1.1.1 port 16384 route 172.26.9.100 192.168.1.1
 transfer-system full-consult
 transfer-pattern .T
 create cnf-files version-stamp 7960 Dec 01 2011 00:47:13
!

 

 

 

Hi,

I have to configure SRST for SIP IP Phones. I am using cisco 2921 router. I want to do it for testing purpose. I am not having any remote site. I have to do on the same gateway which is on the same network that of cucm. can anyone tell from basic configuration i have to do configure SRST properly in my setup. If you need more information pls ask.

Thanks in advance! 

good answer its working with me on phone 7821 

thanks a lot 

Hello Monzer,

 

Could you please share your configuration for SIP SRST on cisco 2901 router. Also what version IOS do you have. Thank you

 

Amerjit

Hello gsidhu,

One question:

This configuration is not necessary add for sip srst ?

 

voice register global
 mode srst
 timeouts interdigit 5
 system message "Modo SRST"
 max-dn 40
 max-pool 40

 

Regards

 

This configuration is mandatory to add the SIP Phones for SRST. Without the commands that you have mentioned here, the router would not allow you to add the voice register pool and throw the following error:

#voice register pool 1
Pool tag too large, maximum 0

 

 

Please rate all the helpful posts.

Hello Sidhu,

The below commands are not in your configuration for SIP SRST,

voice register global
 mode srst
 timeouts interdigit 5
 system message "Modo SRST"
 max-dn 40
 max-pool 40

Is this not required?

Thanks!

Max-pool and Max-dn are mandatory when you are configuring a voice register pool. Without adding max-pool and max-dn, the router would not allow you to add the voice register pool 1 and throw the following error

Pool tag too large, maximum 0

 

 

Please rate all the helpful posts.

Hello there guys, 

 

Is there any other way to register SRST Gw SIP server than SIP-UA? 

 

In this moment I have a SIP trunk For PSTN calls contracted with my carrier. 

 

SRST is not working I have this configuration : 

 

sip
bind control source-interface GigabitEthernet0/2
bind media source-interface GigabitEthernet0/2
registrar server expires max 3600 min 120
transport switch udp tcp

 

!
voice register global
no fac refer
system message SRST SPconnet
max-dn 10
max-pool 5
timezone 9
!
voice register pool 1
id network 172.16.20.0 mask 255.255.255.0
application sip.app
dtmf-relay rtp-nte
codec g711alaw

 

(this is the sip server for outbound calls) 

 

sip-ua
no remote-party-id
retry invite 2
retry register 10
timers connect 100
registrar ipv4:10.**.12*.**:50** expires 1800
sip-server ipv4:10.**.12*.**:50**
connection-reuse
host-registrar
presence enable

 

on CUCM I have already configure the IP of the SRST Gateway for SCCP and SIP  : 

 

SRST Reference Information

Required Field
Required Field
Required Field
Required Field
Required Field

 

 

Thank you 

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