Verilink Red Zone Encryption (REMS) (880-502423-001) Product Manual - Manual (Page 80)

Troubleshooting
8-4 Red Zone Encryption Management System (REMS) User Manual
Troubleshooting using a test set and loopback
If the LED indicators show that REMs is not operating, use a testset (such
as the FIREBERD, T-BERD, or Verilink’s TS2000).
If a testset is not available, you can apply a known good T1 D4/ESF
signal to the DTE input of the FBR.
Put the near-end side of a REMS circuit into loopback in a setup
described in Figure 8 -2, REMS Troubleshooting Using a Testset
Loopback Setup.
Figure 8-2 REMS Troubleshooting Using a Testset Loopback Setup
The testset takes the place of the MUX. The encryptor (KG) is in the
setup. The near-end BRC is looped back.
1. Configure the near-end side of a REMS circuit as the master node.
(Set the FBR to 40, 64 and the BRC to 40.)
2. Put the testset on loop timing.
3. Disconnect the re-sync connection from the FBR to the encryptor, if
it was previously connected.
4. Manually re-sync the KG.
Encryptor re-sync connections are usually made to the Relay Alarm
contacts on the back of the FBR. See Chapter 5, Connecting REMS
components, for procedure to provide re-sync to the encryptor.
The results of this procedure should be:
a. The EQ LED on the FBR NCC 2020 should go Green.
NOTE
B
R
C F
B
R
Encryptor
EIA 530 T1
B
R
C
KG
Test Set
loopback
EIA 530 T1
40
64 (Master) 40 Loop
Timing
DTE