FXO to FXO disconnection problem -- Help me please.

Question

My environment is as follows :
phoneA--<PBX>-FXO-<Router2821>--WAN--<Router2801>-FXO-<PBX>-phoneB
PhoneA NO# is 375
PhoneB NO# is 312
the related configurations from Router2821 are as follows:
voice-port 1/1/3
supervisory disconnect anytone
cptone TH
timeouts call-disconnect 5
timeouts ringing 10
timeouts wait-release 1
connection plar 614
dial-peer voice 8 pots
destination-pattern 379
port 1/1/3
the related configurations form Router2801 are as follows:
voice-port 0/0/3
supervisory disconnect anytone
cptone TH
timeouts call-disconnect 5
timeouts ringing 10
timeouts wait-release 1
connection plar 379
dial-peer voice 4 pots
destination-pattern 614
port 0/0/3
Steps to reproduce to problem are as follows:
1. Phone A dials to 379 ( the assigned NO on FXO of 2821 )
then the connection goes to 614( the assigned NO on FXO of 2801) by plar feature.
2. After got a tone from FXO of 2801, PhoneA dials to NO# 312( Phone B NO#)
and then PhoneB starts ringing.
3. While PhoneB is ringing( NoOne accepts the call ) PhoneA hooks-on the Phone.
--- The problem is PhoneB remains ringing and the FXO of both routers are not released ---
From the configuration above I have applied ringing timeout,disconnect timeout and wait-release timeout
to both routers. But it can't solve the problem.
Could anyone help me to solve this issue ?
Thanks a lot.

Answer 1

I also experienced same problem. I have diagram
- - RouterA <---> RouterB - -
when i put a call from phoneA to phoneB, the same problem occurs.
detail:
phoneA : 101
routerA : 1760
routerB : 1760
phoneB : 630
I have followed the procedure from linksite that had been posted. but the matter still occur. the information and result of debug
RouterB# sh voice call summ
PORT CODEC VAD VTSP STATE VPM STATE
2/0 g729r8 y S_CONNECT FXOLS_OFFHOOK
2/1 - - - FOLS_ONHOOK
(debug routerB)
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_ONHOOK, E_HTSP_SETUP_REQ]fxogs_onhook_setup
Dec 23 00:08:26: [3/1] set signal state = 0x0 timestamp = 0
Dec 23 00:08:26: dsp_set_sig_state: [3/1] packet_len=12 channel_id=129 packet_id=39 state=0x0 timestamp=0x0
Dec 23 00:08:26: TGRM: reg_invoke_tgrm_call_update(0, 3, 1, 0, 1, TGRM_CALL_BUSY, TGRM_CALL_VOICE, TGRM_DIRECTION_OUT)
Dec 23 00:08:26: htsp_timer - 10000 msec
Dec 23 00:08:26: htsp_dsp_message: SEND/RESP_SIG_STATUS: state=0x4 timestamp=56945 systime=639197437
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_WAIT_TIP_GROUND, E_DSP_SIG_0100]fxogs_start_dial
Dec 23 00:08:26: htsp_timer_stop
Dec 23 00:08:26: [3/1] set signal state = 0xC timestamp = 0
Dec 23 00:08:26: dsp_set_sig_state: [3/1] packet_len=12 channel_id=129 packet_id=39 state=0xC timestamp=0x0
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_WAIT_DIAL_TONE, E_HTSP_EVENT_TIMER]fxogs_wait_dial_timer htsp_dial
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_WAIT_DIAL_DONE, E_DSP_DIALING_DONE]fxogs_wait_dial_donehtsp_connect: no_offhook 0htsp_progress
Dec 23 00:08:26: htsp_timer - 350 msec
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_WAIT_ONHOOK, E_HTSP_CONNECT]
Dec 23 00:08:26: [3/1, FXOGS_WAIT_ONHOOK, E_HTSP_CONNECT] -> ERROR: INVALID INPUT
Dec 23 00:08:26: ipm_modem_relay_supported : false
Dec 23 00:08:26: ipm_modem_relay_supported : false
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_WAIT_ONHOOK, E_HTSP_VOICE_CUT_THROUGH]fxogs_handle_cut_thru
Dec 23 00:08:26: htsp_timer_stop
Dec 23 00:08:26: dsp_req_sig_state: [3/1] packet_len=8 channel_id=129 packet_id=40
Dec 23 00:08:26: htsp_dsp_message: SEND/RESP_SIG_STATUS: state=0x4 timestamp=56945 systime=639197438
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_OFFHOOK, E_DSP_SIG_0100]
Dec 23 00:08:26: fxogs_stop_disc_timer
Dec 23 00:08:26: htsp_timer_stop2
Dec 23 00:08:26: htsp_dsp_message: SEND/RESP_SIG_STATUS: state=0x4 timestamp=57228 systime=639197465
Dec 23 00:08:26: htsp_process_event: [3/1, FXOGS_OFFHOOK, E_DSP_SIG_0100]
Dec 23 00:08:26: fxogs_stop_disc_timer
Dec 23 00:08:26: htsp_timer_stop2
note:
both router use IOS 12.3.17a, dspware 4.1.41
and the router doesn't have command for tip_ground
please help..