Functions of the OIUa Board

Functions of the OIUa Board

The OIUa board provides STM-1 transmission over the A, Abis, Ater, and Pb interfaces.

The OIUa board performs the following functions:

?Provides one STM-1 port for TDM transmission

?Provides the Automatic Protection Switching (APS) function between the active and standby OIUa boards

?Provides one channelized STM-1 with the transmission rate of 155.52 Mbit/s

?Processes signals according to the LAPD protocol

?Processes signals according to the SS7 MTP2 protocol

?Provides the OM links when the TCS is configured on the MSC side

?Supports the A, Abis, Ater, and Pb interfaces