Vigor 2862N

Dear All,<br/>
<br/>
Trying to get my daughters work phone set up at home its a INTER TEC 8622, It can call out but you hear no voices in or out when dialled. I have upgraded to latest firmware but does anyine have any ideas what it could be and what settings I need to look at.<br/>
<br/>
It works at her friends house using cheap routers but this is not working.<br/>
<br/>
Help would really be appreciated as 23 year old daughter is throwing a stop at her old man<br/>
<br/>
Cheers<br/>
Andrew

This link is for an Inter TEL phone but there is a "no audio" troubleshooting section so it may help ?<br/>
<br/>
One thing they mention is a firewall conflict?<br/>
<br/>
<br/>
<URL url="https://www.ifixit.com/Wiki/Inter-tel_IP_8660_Troubleshooting"><LINK_TEXT text="https://www.ifixit.com/Wiki/Inter-tel_I ... leshooting">https://www.ifixit.com/Wiki/Inter-tel_IP_8660_Troubleshooting</LINK_TEXT></URL>