Welltech ePBX-100A-128 User Manual
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Enable: Check to enable this SIP Trunk.
Line Number: Line Number for registering to ITSP.
Account: Account Name/ ID for registering to ITSP.
Password: Account Password for registering to ITSP.
IP Address/DNS: Enter IP or domain name of ITSP server.
Port: Port number of ITSP server for registering.
SIP Domain: You can change the SIP domain here if necessary. Some SIP platform
will confirm SIP domain which locate in the From header. Modify this field will let ePBX
register to SIP Trunk successfully.
Realm: Realm of ITSP or another ePBX-100A-128.
Note:
•
When a call was sent form ePBX-100A-128 to a remote SIP-Trunk, the SIP-Trunk
may attempt to authenticate the “call”. So ePBX-100A-128 should reply the
correct Account ID and Password. How does the ePBX-100A-128 know which ID
and Password it should send? When the call is going to SIP-Trunk via
ePBX-100A-128, the SIP-Trunk may reply a 407 code, which will contain a
parameter called “Realm” for authentication, ePBX-100A-128 will re-send the call
again and contains correct ID and Password based on the Realm. So the Realm
should be unique. For more information about Realm, please contact with your
ITSP.
•
If you have multiple ePBX-100A-128, you may hope those ePBX-100A-128 could
call to each other. You should set the Extension to let those ePBX-100A-128 can
register to each other, and you should also confirm the [Realm] in the page of
Configuration
Æ IP PBX. For more information, please refer to the user