Phones register to SRST but DNs do not get Extensions

[Devavrat Oka]

I have the following deployment:

CUCMBE 8.5, CCM-Manager 7.1, 2921 voice gateway (IOS c2900-universalk9-mz.SPA.150-1.M4.bin), Phone load SCCP45.8-5-4S

All phones register to CUCMBE just fine but when I test my SRST gateway, the phones do register but the extensions do not associate with a DN. Its a pretty common problem but I made sure all the versions and loads and IOS are compatible for this feature. I have no clue why my phones do not get a DN when they fallback to SRST. Here're the necessary configs:

!

<<output omitted>>

!

ccm-manager fallback-mgcp

ccm-manager mgcp

no ccm-manager fax protocol cisco

ccm-manager music-on-hold

ccm-manager config server 10.97.22.252

ccm-manager config

!

mgcp

mgcp call-agent 10.97.22.252 2427 service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode out-of-band

mgcp rtp unreachable timeout 1000 action notify

mgcp modem passthrough voip mode nse

mgcp package-capability rtp-package

mgcp package-capability sst-package

mgcp package-capability pre-package

no mgcp package-capability res-package

no mgcp package-capability fxr-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

mgcp rtp payload-type g726r16 static

mgcp bind control source-interface GigabitEthernet0/0

mgcp bind media source-interface GigabitEthernet0/0

!

mgcp profile default

!

<<output omitted>>
!

gatekeeper

shutdown

!

call-manager-fallback

secondary-dialtone 8

max-conferences 8 gain -6

transfer-system full-consult

ip source-address 10.97.22.254 port 2000

max-ephones 100

max-dn 150

system message primary CallManager Unavailable

dialplan-pattern 1 8[2-9]......... extension-length 10

keepalive 10

time-zone 5

!

Does anyone know what could be a workaround for this? I am considering going ahead with the 15.0(1)XA IOS for my 2921 voice gateway. I will post an update on what I observe after the IOS upgrade.

Thanks for taking some time out and looking at this. Appreciate all the help and assistance.

[Jason Polce]

I have run into this issue before and it has to do with the phone loads and SRST version. It was a conflict with the button template. I was running 7.1 on the router and needed to use 8.4.1 to get it going correctly. I think for CME 8.5 the recommended phone load is 9.1.

- Jason

[Devavrat Oka]

Downgrading the Phone-Load to SCCP45.8-3-3SR2S worked for me. I always knew it was a Phone-Load issue after looking at similar discussions on the Internet. I tried 8.5.4. and 8.4 and 9.1 and 9.0, it was just a matter of finding the right load. Thanks Jason!

[Chris Deren]

I agree with others here, it's typically a phone load or IOS compatibility.

Chris

[Devavrat Oka]

Geez now my phone-load is legacy and won't sow the correct time. Instead of using the local NTP time from the voice gateway, it shows the UTC time.

[Devavrat Oka]

Ok it was an issue with the legacy phone-load. Phone-Loads 9.0(2) and prior require you to select a compatible time zone (marked with 2 '+' signs one on top of other) on the Call Manager NTP reference list.