[cisco-voip] BYE from Cisco gateway

[Torbjørn Lium]

I'm using a cisco 1760 with a VIC2-4FXO card for my calls to PSTN.
All calls through the cisco to PSTN goes through Asterisk.
If a user on a softphone hangs up first the PSTN port on the cisco is 
released and new calls can be made on the same voice port. But when the 
user on the PSTN side hangs up first the voice port on the cisco stays 
open until the user on the softphone hangs up.
Any ideas what I'm doing wrong?