Overview - Grandstream Networks UCM6100 Series Configuration

This document describes basic configuration to interconnect UCM6100 series and FreePBX via SIP
register trunk. Once properly configured, the extensions on both PBX can securely make calls to each
other.
Warning:

When the UCM6100 series is interconnected with other PBX, it is NOT recommended to turn on
"Allow Guest Calls" under web GUI->PBX->SIP Settings->General. Turning on this option will
allow unauthenticated calls coming through the UCM6100 series. Please be aware of the security
concerns when using this option.

When using the IVR in UCM6100 series, please be aware that if "Dial Trunk" option is turned on in
IVR settings, the call into the IVR will be able to dial outbound call using UCM6100's trunk. The
IVR's permission level will be used when making outbound calls in this case. Please select proper
permission level for the IVR to control the outbound call allowed via "Dial Trunk".

There are vast deployment possibilities when peering and interconnecting PBX systems. Due to
highly customizable nature of both the UCM6100 series and FreePBX, please use this tutorial as a
basic sample to get UCM6100 series work with the FreePBX. The actual implementation may be
customized and different from this basic configuration.
Firmware Version 1.0.1.25

OVERVIEW

Configuring UCM6100 Series With FreePBX Page 3 of 10