Talkswitch CT.TS005.002606 Manuel D’Utilisation

An external IP extension is an IP phone located outside the office. It is configured 
as a local extension of a TalkSwitch system, but connects to the system over the 
Internet or private data network. A user can receive or place a call with their 
external IP extension through the TalkSwitch unit to the standard telephone 
network, or to a VoIP network. An external IP extension requires at least one 
VoIP-enabled TalkSwitch unit at the office.

For example, the following illustration shows external IP extension 151 at a home 
office, and 152 at a branch office. The external IP extensions connect to the 
TalkSwitch unit at the main office over the Internet. In this example, a user can 
receive or place a call with their external IP extension through the TalkSwitch 
unit to the standard telephone network.

Figure 2: External IP extensions

Before proceeding, ensure you have:

•

Connected the TalkSwitch system at each location to a network (see page 3).

•

Configured local and public IP addresses (page 4).

•

Configured the router (page 7).

Warning: Calls to an emergency service number (e.g. 911) using an external 
IP extension will not send the correct address to the emergency operator.

We strongly recommend that you apply a warning label to any external IP 
extension stating:

1. Calls to emergency services should not be placed from this phone.

2. If an emergency call is made from this phone, you must provide your 

address to the emergency operator.