[Serusers] Cisco 3640 connect to PBX

[Akarach Rattanawaree]

Hello,

            I have Cisco 3640 with Voice and E1 card connected to Nortel PBX
for call out from PBX to PSTN. I have problem when 

 

1.      user hang-up the phone and got dial tone from PBX

2.      dial prefix 9 and telephone number (9,024455566) 

3.      user will got dial tone again from Cisco

4.      If user dial telephone number again, it can go to PSTN. (024455566)

 

            User ------ > PBX ----- > Cisco 3640 ----- > SIP Server ----- >
PSTN

 

Have you ever found this case? I have tried to use command "isdn
overlap-receiving" on serial interface.

 

Thank you 

Ake

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