The following port types are found on the IP Office control unit and external expansion modules:

•ANALOG
Used for the connection of external analog trunks.

•AUDIO
Used for input of an external music on hold source.

•BRI
Used for connection of BRI trunks (Quad BRI trunk card). In IP Office standard modes they can also be used for ISDN terminals devices (So8 mode).

•DC I/P
Power input from external power supply unit.

•DS
Connection of Avaya digital station phones supported by IP Office.

•RS232/DTE
Used for control unit maintenance under Avaya guidance. On expansion modules not used.

•EXPANSION
Used for interconnection of external expansions modules and control units.

•EXT O/P
Used to control external relay systems. The port provides two switchable (on, off and pulse) controls.

•
Used for connection of functional or protective ground if required.

•LAN
10/100Mbps Ethernet LAN ports.

•PF
Analog power fails ports.

•PHONE (POT)
Analog phone extension ports. On older units these ports are labeled as POT ports.

•PRI
PRI trunk ports.