DT信令中Channel Request的幾個問題


MS1
Channel Request
Time: 11:02:04.73
Frame number: 1346982
Frame number : 842941
Random Access Information
Establishment cause : (7) Originating speech call from dual-rate MS when TCH/H is sufficient and supported by the MS for speech calls and the network sets NECI bit to 1
Random reference : 13

Header dump (Hex):
E9 00 07 00 00 00 04 07 00 01
05 00 0C DC BD
Message dump (Hex):
4D

問題：麻煩解釋下意思，謝謝了，如果有這方面的資料更好了。