Grandstream Networks UCM6100 Series Configuration page 19


Outbound call
The extension registered to the UCM6100 can dial prefix + PSTN number to reach outside numbers in
PSTN network, as defined in UCM6100 outbound route.

Inbound call
The user from outside network can dial into the PSTN line's number (connected to HT503). And then
he/she will reach the IVR of the UCM6100. The IVR on UCM6100 would allow the user to further enter
extension number or key pressing digit to reach the desired destination. The inbound call will go
through the inbound route set up on the UCM6100.
* Asterisk is a Registered Trademark of Digium, Inc.
Firmware Version 1.0.1.25 Configuring UCM6100 Series with HT503 Page 18 of 18