PPP

Synchronous/Asynchronous serial interfaces that work in synchronous mode. The interface name is Serial.

Async interfaces working in protocol mode.

Interfaces formed by CE1/PRI and CT1/PRI interfaces (including ISDN PRI interfaces). The interface name is Serial and the interface logic is the same as that of synchronous serial interfaces.

Interfaces formed by CE3 interfaces. The interface name is Serial and the interface logic is the same as that of synchronous serial interfaces.

Interfaces formed by E1-F and T1-F interfaces. The interface name is Serial and the interface logic is the same as that of synchronous serial interfaces.

Interfaces formed by E1/T1 interfaces that are channelized from CPOS interfaces. The interface name is Serial and the interface logic is the same as that of synchronous serial interfaces.

Cellular interfaces.

ISDN BRI interfaces.

POS interfaces.