Cisco Bug: CSCup83118 - KPML dialing fails for CUCM Lineside SIP phones
Jul 12, 2021
Known Affected Releases
Symptom: SIP phone registered to CUCM via the Lineside feature are unable to make calls using non-enbloc dialing (KPML). When an IP phone goes offhook first then a digit is pressed, a SIP Invite gets sent to CUBE then gets forwarded over to CUCM. The CUCM server then sends back the subscription for KPML for the IP phone however the CUBE shows the following error then sends a 503 Service Unavailable back to CUCM. 014177: *Jun 30 14:24:24.431: //0/000000000000/SIP/Info/info/32768/ccsip_spi_asnl_event_subscribe_event: New Incoming SUBSCRIBE 014178: *Jun 30 14:24:24.431: //0/000000000000/SIP/Error/ccsip_spi_asnl_event_subscribe_event: Maximum accept subscription limit reached Current Active Incoming Subscriptions (-4) Conditions: CUCM Lineside with a SIP phone trying to dial using non-enblock dialing (KPML signaling).
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