The GEIUP enables the E1/T1 transmission on the Pb interface.
The GEIUP performs the following functions:
- Provides four E1/T1 electrical ports, which is used for TDM transmission
- Provides Tributary Protect Switch (TPS) function to enable switchover
between the physical links of the active and standby boards.
- Transmits and receives 32 E1/T1 signals, and encodes and decodes
the E1/T1 signals (The E1 transmission rate is 2.048 Mbit/s and the
T1 transmission rate is 1.544 Mbit/s.)
- Processes signals according to the Link Access Procedure on the
D channel (LAPD) protocol
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