Grandstream ATA HT8XX Hunting Group and Request URI Routing ID

Grandstream ATA Analog Adaptor HT8XX Hunting Group


This article describes the designed behavior of hunting behavior in the Grandstream analog adaptor (ATA) HT8XX series. There are 2 Hunting Group types, “Linear” or “Circular” under the Profile page. The default type is Circular. The circular style will distribute the calls “round-robin”. If a call is assigned to line 1, the next call goes to 2 and the next to 3.

How does the Hunting Group work?

It requires only 1 SIP Account per hunting group – 1 FXS port needs to be registered with the SIP Account. Set the hunting group on Port 1 as Active and the following FXS Ports to ‘1’, the rest of the FXS ports are unregistered and become members of the Hunting Group. When the HT8XX receives an inbound call, the phone on FXS 1 will ring for 20 seconds (default ring timeout setting), then it will ring the next member of the hunting group.

Behavior #1 – Request URI Routing ID

  1. At Port 1, configure a SIP account, select Active under the Hunting Group, and configure Request URI Routing ID: 12133743100
  2. At Port 2, select ‘1’ under the Hunting Group to be part of the group member. Configure the Request URI Routing ID: 12133743100
  3. When someone dials 12133743100 and Port 1 misses the call, it will be routed to Port 2. If the ‘Request URI Routing ID’ is not configured at Port 2, the call will be dropped if no one picks up.

Behavior #2 – Call Forwarding

The HT81X doesn’t forward the call if the port is a hunting group member. The “Active” port is capable of forwarding the call, but the member ports of that ‘Active Port’ hunting group cannot forward the call.

When a port is a hunting group member, the ‘Call Features’ of that port is invalid, only the features of the ‘active port’ will be enabled.

For eg, when the call forward number of the ‘Active Port’ is 123, while the call forward number of the hunting group port member is 456. When someone dials in the hunting group member using the Request URI Routing ID, it will forward to 123 rather than 456. If the call forward number of the ‘Active Port is null, the call forwarding will not occur.