I have some problems about the IP COM system.

1.when a call had finished, a few minutes later I made another call, but i could not hear any dial tone. After that, showing command in IAD 2430 (connect directly to telephone via FXS port), I found that the port of this telephone number was connected. But infact, the call had finished as below :

----------------------------FLEX VOICE CARD 0 ------------------------------

*DSP VOICE CHANNELS*

DSP DSP DSPWARE CURR BOOT PAK TX/RX

TYPE NUM CH CODEC VERSION STATE STATE RST AI VOICEPORT TS ABRT PACK COUNT

===== === == ======== ======= ===== ======= === == ========= == ==== ============

C5510 001 01 None 4.4.6 busy idle 0 0 2/1 01 0 1200371/17

C5510 001 02 g711alaw 4.4.6 busy idle 0 0 2/0 00 0 1160/921

C5510 001 03 g711alaw 4.4.6 busy idle 0 0 2/5 05 0 989/452 <======= this number on port had finished and I could not hear dial tone

C5510 001 04 g711alaw 4.4.6 busy idle 0 0 2/23 23 0 401/929

C5510 001 05 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 06 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 07 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 08 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 09 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 10 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 11 None 4.4.6 idle idle 0 0 0 0/0

C5510 001 12 None 4.4.6 idle idle 0 0 0 0/0

Please take a look in the bold row. When i used command "shutdown" then used "no shutdown" on this port, this port became normally and I can hear dial tone.

2. After a call finished, I hang up telephone. 2 to 4 seconds later, it will be ringing until I pick up although there is no incoming call.

3. During the calling conversation, the call is usually automatically dropt (we can't hear any sound from each other)