ADTRAN T1 CSU ACE - Manual (Page 33)

Chapter 2. Installation
61203022L1-1B T1 CSU ACE User Manual 33
Break-and-Test Jacks
The other four jacks are break-and-test jacks used for out-of-service
testing. These jacks bypass the connections of the modular jacks. NET IN
and NET OUT are used to simulate the network input and output of the
T1 CSU ACE. To test the CPE, a T1 Bit Error Rate Test (BERT) test set can
be used to simulate the network.
EQ IN and EQ OUT can be used to sim-
ulate the CPE with a BERT test set, allowing the network to be tested.
The T1 CSU ACE on the other end of the circuit can be looped back to
test only the network. Most BERT test sets have the ability to send LB en-
able and LB clear codes.
The test set’s input impedance must be set for TERM when
connected to the break-and-test jacks.