The GEHUB enables the E1/T1 transmission on the Abis interface.
The GEHUB performs the following functions:
Provides four E1/T1 electrical ports, which are used for HDLC/Hub BTS 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.)