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The " dialplan-pattern " command with "no-reg" is configured at the end to expand an internal extension , even though "no-reg" is configured the dialplan-pattern kept on sending SIP REGISTER request over the SIP trunk .
Issue occur if the dialplan-pattern and ephone-dn are configured in below mentioned order : ++ Enter the ephone-dn configuration without "no-reg" . ephone-dn 1 number 6060 ++ Now add the dialplan-pattern without no-reg under the telephony-service dialplan-pattern 1 65951100 extension-length 4 extension-pattern 6060 ++ Now add the "no-reg" under the ephone-dn config . ephone-dn 1 number 6060 no-reg both ++Now if we remove the dial-plan configuration from the telephony-service . US_GK(config-telephony)#no dialplan-pattern 1 65951100 extension-length 4 extension-pattern 6060 ++ Add back the dialplan-pattern with "no-reg" US_GK(config-telephony)#dialplan-pattern 1 65951100 extension-length 4 extension-pattern 6060 no-reg
Reload the router fixes the issue Temporarily .
Please refer to tac-repro for more details .
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