Verilink Red Zone Encryption (REMS) (880-502423-001) Product Manual - Manual (Page 81)

Troubleshooting using a test set and loopback
Red Zone Encryption Management System (REMS) User Manual (Rev. B, preliminary) 8-5
b. The EQ LED BRC NCC 2020 should go Green.
c. The KG should stay up and running.
5. Look for the following final indicators:
a. Steady flashing of the Port 1 and Port 2 LEDs on the FBR DIU
front panel indicate the FBR is receiving good REMS code and is
trying to align.
6. If the above indications are not present, check the polarity of the EIA
530 signal wires. Crossed wires can cause a data inversion. (See
Figur e5-3, Pin-to-Pin System Cabling Diagram.)
7. At the encryptor, re-verify the clock and data phase relationship. If
the Clock does not have the proper phase relationship to the data
from the FBR, correct the phase relationship by optioning the “phase
select” strap in the encryptor.
8. Repeat the above steps for the far end.
Sending framed
all-ones to verify
BRC connections
to the T1 line After confirming that the T1 line is good, and the NET LED (on one or
both BRCs) is still Red, perform the following steps:
(Refer to Figure8- 3, Example of Typical REMS Circuit Configuration in
Troubleshooting Mode.)
1. Plug an ASCII terminal into the Craft interface on the near-end BRC
NCC 2020 front panel. (Alternatively, you can attach a PC running
AM2000 to the BRC CDM 2049 Management In port.)
2. Using the ASCII terminal interface or the AM2000, change the keep-
alive signal at both BRCs to FAIS (framed all-ones). The NET LEDs
should go Green.
This keep-alive signal provided by the BRC allows the BRC to frame up
even though the encryptor may not be sending signal toward the BRC and
the T1 line.
NOTE