Set Up SIP trunk with Les.net on IP Office
Setting up a SIP trunk between the IP Office and Les.net (Compliments of Kyle L Holladay Sr., R.I.P.)
In this example we will configure a SIP trunk between the Avaya IP Office and LES.net using a static IP address assigned to LAN1 behind a firewall/NAT. Alternative configurations would include registration which is supported by LES.net for users with a dynamic IP addresses or you could assign a public IP to the IP Office on LAN2 outside of your firewall/NAT.
First we need to obtain the IP address of the LES.net SIP server. Because the IP Office does not use DNS to resolve the name of the SIP server you will want to use PING on your PC to resolve this name. From your computer enter ping did.voip.les.net from the command line (CMD) and make note of the IP address that is returned. From this point on we will use 64.34.181.47 to refer to the LES.net SIP server.