Avaya IP extension

Is there a way to have the gateway connect to my Avaya switch using a IP extension

Yes, as long as the IP extension is SIP based. For example, if it works with a SIP softphone like X-Lite, then it should work with Voicent software.

All you need to do is configure Voicent software as SIP extensions. (Gateway > setup > options > SIP)

Depending on the Avaya switch or PBX you have, it may or may not support SIP directly. However, Avaya offers a product called “SIP Enablement Services”, aka, SES, which enables its products to use any SIP based hardware and software, including Voicent software. You would configure Voicent software as an extension or extensions of the Avaya switch. To configure, go to Voicent Gateway > Setup > Options & SIP, and enter:

Display Name : name
SIP ID : extension
password : ***
user name : extension
proxy : ip adres SES server

If you do not have SES, you could simply find a VOIP service and configure Voicent software to use it directly, bypassing the Avaya switch.