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Cisco Bug: CSCtc79875 - Party C hears ringback tone when CW is involved

Last Modified

Mar 09, 2010

Products (1)

  • Cisco BTS 10200 Softswitch

Known Affected Releases


Description (partial)


Party C hears ringback instead of busy tone


1.       Party A, B and C  are all on-net sub
2.       Party B calls party A and call is up
3.       Party C calls party A and A hears CW reminder tone, then hf to talk to C
4.       Party A goes on-hook 
5.       Party C goes on-hook
6.       Party A gets reminder ring for the call between A and B
7.       During the ringing stage for party A, party C goes off-hook and hear ringback instead of busy tone 
8.       Party A goes off-hook and two-way voice path was established between A and C
9.       Party B was released by BTS shortly after A +C
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