Cross Connections | 129
Drop and insert cross connections
An example of a drop and insert cross connection is shown below:
Two 4 wire E&M interfaces on the near end terminal slot C ports 3 & 4 are dropped out of a framed E1
on the near end terminal slot D port 1 in timeslots 1 & 2. This cross connection includes one bit of
signalling (A bit).
Another two 4 wire E&M interfaces on the near end terminal slot C ports 1 & 2 are inserted into the
radio link to a framed E1 on the far end terminal slot D port 1 in timeslots 1 & 2. This cross connection
includes one bit of signalling (A bit).
The remaining framed E1 on the near end terminal slot D port 1 timeslots are transported over the
radio link to the framed E1 on the far end terminal slot D port 1. This cross connection includes four
bits of signalling (ABCD bits).
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