EXTERNAL IP EXTENSIONS
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.
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
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).
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