Cisco Bug: CSCup27918 - Voice port stucks in Clearback for E1 R2-digital signalling
Apr 17, 2019
- Cisco 3900 Series Integrated Services Routers
Known Affected Releases
Symptom: Symptoms:- Voice port stuck in clearback E1 R2-digital if the PSTN side disconnects the call. Version:- c3900-universalk9-mz.SPA.153-2.T1. Call flow:- E1R2 -----3945 ----H323----UCM -- Ip phone. More details:- ++ Call works fine, but if the pstn user hangs up the call first, voice port stucks in clearbak, never becomes idle and call is not cleared. ++ If the call is hung up from IP side, then voice port is not stuck and TDM call-leg is released. ++ Shut/no shut on the port/controller doesn't clear the status, customer has to reboot the router to restore it back. ++ However it works in IOS 152-3.T3, and voice port is properly released. ++ From the debugs, GW after receiving clear bwd, is supposed to send IDLE message back to the provider, but it is not in the non-working case. Conditions: When the call is first released from PSTN side.
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