SIP2Megaco case:caller onhook first

Hi All,

:) i need a hand again here,
This time, the case is the caller onhook first. You can view the data using
this filter : *(megaco and ip.addr==10.14.32.186) or (sip and
ip.addr==10.14.32.185) or rtp.

*The questions are:
1. After the callee offhook, why did the MGC send 3 modify command (line
3601, 3701, 3708) ? What are they for?
2. Is line 3708 was sent to remove the ring tone?

Thx before in advance.

Regards,

Jati