SONET/SDH and TDM port encapsulation

Overview

SONET/SDH and TDM ports can be configured as connection termination points in SAPs and IP interfaces. They can be channelized.

An access port is used for customer-facing traffic on which services are configured. SAPs can only use an access port. When a port is configured for access mode, the appropriate encapsulation type must be specified to distinguish the services on the port.

You must configure the Encap Type parameter from the General tab at the connection termination point. SONET/SDH or TDM ports or channels support the following encapsulation types, depending on the MDA type:

• BCP Null

• IPCP

• BCP Dot1 Q

• FR — Support multiple services using the DLCI header to distinguish services

• ATM — Support multiple services using the VCI or VPI of the PVC

• PPP Auto

• CEM

MTU size considerations apply to SONET/SDH and TDM channels. See MTU size and port configuration in Working with port and channel objects for more information.