I have a TA908e that suddenly lost ringback on outbound calls. The unit is connected via SIP to an IPPBX and providing fxs to a PBX. My PBX shows 183 with SDP being sent but it seems to be getting lost in the 908. Looking at the debug logs from the 908 I see what I believe is the issue just not sure why this started happening or how to correct.
6:26:05.511 SB.CALL 1154 Delivering Sent preConnect from T01 to 1001
06:26:05.512 SB.CALL 1154 State change >> Delivering->PreConnecting
06:26:05.512 SB.CALL 1154 PreConnecting ERROR! Dropped deliverResponse routine
06:26:05.512 SA.1001 Ca:0 Calling rcvd: preConnect from SB
06:26:05.512 SA.1001 Ca:0 Calling State change >> Calling->Alerting (CAS_Alerting)
06:26:05.512 SA.1001 Ca:0 Alerting sent: AcctPhoneMgr_preconnect to PM
06:26:05.512 PM.0:1 Call Pending Preconnect handled.
06:26:05.513 PM.0:1 Call Pending processed CACHG:Connected
06:26:05.513 PM.0:1 State change >> Call Pending->Connected
06:26:05.513 SA.1001 sent: preConnectResponse(pass) to SB
06:26:05.513 SA.1001 Ca:0 Alerting rcvd: AcctPhoneMgr_connect from PM
06:26:05.513 SB.CCM preConnect: convert answer SDP to sendonly
06:26:05.514 SB.CCM connect:
6:26:05.523 MEDIA.MANAGER Setup RTP Channel true for 0/1.1
06:26:05.523 SB.CCM setupRtpChannel, source 1, silence 0
06:26:05.523 SB.CCM setupRtpChannel: Received SDP contains sendonly SDP; disabling RTP transmission
06:26:05.523 SB.CCM setupRtpChannel: setup using media connection
06:26:05.527 SB.CCM connect: TDM streams: port(FxsPhone 0/1) to port(SipTrunk 0/1.1)
06:26:05.527 SB.CALL 1154 State change >> PreConnecting->PreConnected
06:26:05.528 SB.CALL 1154 PreConnected Call PreConnecting from 1001 to T01
06:26:05.528 RTP.CHANNEL fxs 0/1 - Dsp 0/1.1 - RTP: starting
06:26:05.528 TA.T01 ERROR! preConnectResponse ignored
