Extending Analog Phone Lines over IP

Scenario:
In this scenario we will explain how to use the Grandstream HT502 and HT503 to extend an Analog Line over IP without a SIP Server).

Important:
1. Please upgrade firmware on both HT502 and HT503 to at least version 1.0.9.1 prior to configuring. 
2. Ensure both devices can reach each other via their WAN interfaces. This scenario is based on both devices connected to the same subnet (10.1.1.0/24).

HT502 Configuration:

Basic Settings:

 IP Address: 10.1.1.40

 Subnet Mask: 255.255.255.0

 Default Router: 10.1.1.1

 DNS Server 1: 10.1.1.1

FXS Port 1:

 Primary SIP Server: 10.1.1.41:5062

 SIP User ID: 12345