[Asterisk-Users] Strange problem with incoming call.

[C F]

When someone calls in on a zap channel with FXO and presses an
extension, and another user picks up using (*8) I changed it to 888,
after a few minutes ( I think 2), the call gets dissconected. The
users all use Cisco 7960.
I didn't yet have a chance to test it when not using Call Pickup (*8)888.
Please help.
Here is the screen shot in asterisk:
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    -- Executing Macro("Zap/1-1", "rollbusy|102") in new stack ;macro
to ring next available line on cisco phone
    -- Executing Dial("Zap/1-1", "SIP/1021|15|tm") in new stack
    -- Called 1021
    -- Started music on hold, class 'default', on Zap/1-1
    -- SIP/1021-eaad is ringing
    -- SIP/1011-4c98 answered Zap/1-1 ;another phone picked up pressing 888
    -- Stopped music on hold on Zap/1-1
pbx*CLI> sip debug ; i enabled debug here
SIP Debugging Enabled
set_destination: Parsing <sip:1011 at 192.168.123.60:5060> for
address/port to send to
set_destination: set destination to 192.168.123.60, port 5060
Reliably Transmitting:
BYE sip:1011 at 192.168.123.60:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.123.50:5060;branch=z9hG4bK01879857
From: <sip:888 at 192.168.123.50>;tag=as4fb177da
To: "JJ Fried" <sip:1011 at 192.168.123.50>;tag=003094c29e4902aa56de3e78-1e1782d1
Contact: <sip:888 at 192.168.123.50>
Call-ID: 003094c2-9e4901da-6a7d98ef-2cd7bf54 at 192.168.123.60
CSeq: 102 BYE
User-Agent: Asterisk PBX
Content-Length: 0

 (no NAT) to 192.168.123.60:5060
  == Spawn extension (macro-rollbusy, s, 1) exited non-zero on
'Zap/1-1' in macro 'rollbusy'
  == Spawn extension (macro-stdext, s, 2) exited non-zero on 'Zap/1-1'
in macro 'stdext'
  == Spawn extension (macro-ccs, s, 5) exited non-zero on 'Zap/1-1' in
macro 'ccs'
  == Spawn extension (macro-handleexten, s, 4) exited non-zero on
'Zap/1-1' in macro 'handleexten'
  == Spawn extension (closed, 102, 1) exited non-zero on 'Zap/1-1'
    -- Executing Playback("Zap/1-1", "goodbye") in new stack
    -- Playing 'goodbye' (language 'en')
pbx*CLI>

Sip read:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.123.50:5060;branch=z9hG4bK01879857
From: <sip:888 at 192.168.123.50>;tag=as4fb177da
To: "JJ Fried" <sip:1011 at 192.168.123.50>;tag=003094c29e4902aa56de3e78-1e1782d1
Call-ID: 003094c2-9e4901da-6a7d98ef-2cd7bf54 at 192.168.123.60
Date: Thu, 06 Jan 2005 23:26:08 GMT
CSeq: 102 BYE
Server: CSCO/6
Content-Length: 0


9 headers, 0 lines
Message is BYE
Destroying call '003094c2-9e4901da-6a7d98ef-2cd7bf54 at 192.168.123.60'
    -- Executing Hangup("Zap/1-1", "") in new stack
  == Spawn extension (closed, T, 2) exited non-zero on 'Zap/1-1'
    -- Executing System("Zap/1-1", "/bin/rm .gsm") in new stack
    -- Hungup 'Zap/1-1'
pbx*CLI>
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Please help.
Thanks