[asterisk-users] Problems with Hangup

[Chan Kwang Mien]

Hi,

my test-bed is :

sipphone <--> Asterisk PBX <--> PSTN <--> Cell Phone

sipphone was able to setup a connection to Cell Phone. When sipphone
hangs up, Cell Phone also hangs up. However, when Cell Phone hangs up,
sipphone was not able to hang up.

Could it be that Asterisk was not able to recognise the hangup tone when
the Cell Phone hangs up ?

Does anyone know what the reason is ?

Thank you.

regards,
Kwang Mien