asterisk users - Jun 2004 - WaitforDigit give ring on Analog Phone

Hello

I have an interesting situaltion and not sure if I am doing something wrong or
it is a BUG. I Installed Rhino Channel on T1 line and connected Analog Phone on
Rhino's Zap Channels. If i pickup analog phone and hangup without dialing
any number , I am getting extra ring after hangup and if i dial any digit than
there is no ring on Analog phone after hangup.
Log's looks like this

  -- Starting simple switch on 'Zap/1-1'
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:3480 __zt_exception: Exception on
23, channel 1
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:2843 zt_handle_event: Got event On
hook(1) on channel 1 (index 0)
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:1175 zt_disable_ec: disabled echo
cancellation on channel 1
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:4525 ss_thread: waitfordigit
returned < 0...
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:1781 zt_hangup: Hangup: channel: 1
index = 0, normal = 23, callwait = -1, thirdcall = -1
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:1175 zt_disable_ec: disabled echo
cancellation on channel 1
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:2172 zt_setoption: Set option TDD
MODE, value: OFF(0) on Zap/1-1
Jun  2 18:14:06 DEBUG[1234379840]: chan_zap.c:1118 update_conf: Updated
conferencing on 1, with 0 conference users
    -- Hungup 'Zap/1-1'

Thanks in advance for any help.

Regards

Deepak
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