Telephone ports

The Internet Gate has local telephone ports (FXS) allowing connection of analogue telephones, and telephone line port (FXO) allowing connection to a telephone landline.

Telephones connected to the PH ports can be used as SIP phones.

You either control phone behaviour using the Telephone ports page or dial codes.

The LINE port can be attached to an ordinary telephone line. Then phones connected to the PH ports as well as all SIP phones on LAN can use that telephone line to dial out.

Normally, a telephone number dialed on a SIP client is sent to the VoIP service provider for handling. However, SIP calls can also be forced to the ordinary telephone network through the LINE port by:

The dial prefix is ** by default, but can be changed on the Telephone Ports page. Dialing **[telephone number] on any telephone connected to the PH ports or on any SIP client on the LAN, will call that telephone number through the LINE port.

The virtual domain name is by default “localgw” but can be changed on the Telephone Ports page. Any SIP client calling [telephone number]@localgw will dial the stated telephone number through the LINE port ¹⁾.

Emergency numbers are forced to the LINE port as set up on the SIP Switch page.

If you purchase the optional SIP Switch feature, the Dial Plan on the SIP Switch page can be used to route telephone calls through the LINE port, in many useful ways.

If anyone calls the telephone number of the phone line connected to the LINE port, the call will by default be forwarded to the telephone connected to the PH1 port.

This behavior can be changed on the Telephone Ports page.

You can also set up more advanced functions, like collection of extension digits and directly allow forwarding of incoming calls to certain SIP clients. This works if you have given your SIP clients numeric SIP user names, or if you use the extension number feature of the optional SIP Switch software.