SIP SRST on SIP VG

[Yangjp715]

Hi all,

Is there anything wrong in my configuration below? No desk phones (all are 8845) were registered on the router when i blocked WAN link interface (SIP trunk was down in CUCM).

voice service voip
ip address trusted list
ipv4 10.41.40.10 255.255.255.255
ipv4 10.41.40.20 255.255.255.255
ipv4 10.121.121.7 255.255.255.255
ipv4 10.255.22.9 255.255.255.255
media disable-detailed-stats
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
supplementary-service h450.12
no supplementary-service sip refer
modem passthrough protocol codec g711ulaw
h323
h225 timeout setup 3
no h225 timeout keepalive
h225 display-ie ccm-compatible
call preserve
sip
bind control source-interface Loopback0 (SIP trunk IP)
bind media source-interface Loopback0
registrar server expires max 600 min 60

voice register global
mode esrst
no allow-hash-in-dn
system message "SIP SRST 4331 Service"
max-dn 20
max-pool 30
timezone 8
dialplan-pattern 1 204030250. extension-length 4 extension-pattern 250.
tftp-path flash:
!
voice register pool 11
id network 10.3.22.128 mask 255.255.255.128 (voice IP subnet)
dtmf-relay rtp-nte sip-notify
codec g711ulaw

sip-ua
registrar ipv4:10.255.22.65 expires 600 (WAN interface IP)

dial-peer voice 97 pots
trunkgroup Trunk_FXO
destination-pattern 9T

Thanks in advance!

[Yangjp715]

Any idea? Thanks

[Yangjp715]

Any help would be appreciated!

[Roger Kallberg]

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bind control source-interface Loopback0 (SIP trunk IP)
bind media source-interface Loopback0

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I would recommend that you set these to something that the phones can communicate with in SRST. Often this would be the interface that faces the phones. For other things, like calls and so on, you can set the bind statements as needed on the dial-peers in each direction.

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registrar ipv4:10.255.22.65 expires 600 (WAN interface IP)

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Same comment as above, set this to something that the phones can communicate with. Likely the LAN interface IP of the gateway.

A silly question, have you made sure that you have both a IP set on the SRST configuration object in CUCM for both SCCP and SIP? This is quite often forgotten.