SIP trunk connection with Grandstream 4501

[rifkichaniago]

Hi All,

I have 3CX connection with Grandstream 4501, the network diagram as below:
Telco Provider <== E1 ISDN==> Grandstream 4501 <=== SIP trunk ==>3CX ====> Extension

When extension of 3CX makes external outgoing call, the caller ID will be displayed can not be caller ID of extension where we had setup.
Caller ID is always 63216642 while we already set caller id 63321296.
63216642 is one of DID number is given by Telco provider as well as 63321296.

Attached is trace call and setting for extension with caller ID 63321296


Any idea how to solve this issue?


Thanks

Best regards


Rifki