The Avaya MM714B provides four analog telephone ports and four analog trunk ports.
Any of the 4 trunk ports can be configured as:
Loop start or ground start CO trunk
2-wire analog outgoing CAMA E911 trunk
Any of the 4 analog line ports can be configured as:
Wink start or and immediate start analog DID trunk
Analog tip/ring port for devices such as single line telephones with or without LED message waiting indication
Supported in G350, G450, and G700 Media Gateways