[cisco-voip] SRST Issue: Phones in Fallback Mode do have a different configuration than when registered to CUCM

[Adam Frankel (afrankel)]

Hans,

Do you have the problem phones configured as ephones?

Regards,

Adam



------------Original Message--------------
From: Hans Walter <chrisw1207 at googlemail.com>
Sent: Tue, Apr 12, 2011 10:50:49 Am
To: cisco-voip at puck.nether.net
CC:
Subject: [cisco-voip] SRST Issue: Phones in Fallback Mode do have a 
different configuration than when registered to CUCM
> Hi List Members,
>
>
> I do have a strange Problem in regards to SRST and i am running out of 
> ideas what is causing the issue.
>
> I have installed a CUCM 7.1.3-2000 in my Lab Environment for Study 
> purposes with several IP Phones registered to it and a 2821 ISR Router 
> with c2800nm-ipvoicek9-mz.124-24.T.bin.
>
> After reading up how SRST works and how it is configured, i started 
> immediately to test it out.
>
> I have the following, SRST related, configuration on the 2811 Router.
>
>  call-manager-fallback
>  max-conferences 8 gain -6
>  transfer-system full-consult
>  limit-dn 7960 2
>  ip source-address 172.16.7.254 port 2000
>  max-ephones 58
>  max-dn 192
>  keepalive 20
>
> The Feature itself is working like a charm. As soon as the connection 
> to the CUCM is gone, the IP Phones go in the Fallback Mode and 
> register with the SRST Gateway.
>
> Now here is the strange thing i do not understand.
>
> As soon as this happens the Phones have a complete different 
> configuration (e.g. the DN) as when they are registered to the CUCM.
>
> As far as i understand, the IP Phones store the last configuration in 
> Flash memory, and when they register with the SRST Gateway, the 
> Gateways retrieves the configuration from the phones.
>
> Now why do they have a complete different configuration? Shouldn't the 
> configuration, which is active when registered to the CUCM, stored as 
> "last configuration" ?
>
> The configuration in SRST Mode is the configuration of a colleague of 
> mine, which had a lab before i got the telephones.
>
> This behaviour does not occur on all IP Phones. 2 7960 work like i 
> would it have expected, they go in Fallback Mode and nothing changes.
>
> All other IP Phones behave like mentioned above.
>
> I have tried to do a Hardware Reset (plug the cable and put back in 
> with the # pushed), but this only solved the issue partially. Now when 
> they go in SRST Mode they have no configuration at all.
>
> The 7960 have P00308010100 as App Load ID and Version 8.1(1.0). These 
> 7960 are the ones which work without problems.
>
> The 7962 have SCCP42.8-5-2SR1S and SCCP41.8-5-2SR1S and the 7911 has 
> SCCP 11.8-5-2SR1S and all do not behave like expected.
>
> So how can i fix this issue and what is causing it?
>
> Sorry for the wall of text, i am quite new to the whole Voice World.
>
> I hope a provided all information which are needed. If you need 
> additional information, don't hesitate.
>
> Thanks in advance for your time and help
>
> Cheers,
> Chris
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> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
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