User manual

Chapter 4. Status Menu
4-6 TDU 120e User Manual 61202156L1-1
DS-1 (0.2) Menu Items (DS-1 Errors)
• CRC - An asterisk displays under the CRC if there are
CRC errors in extended superframe format (ESF) mode.
If the DS-1 is configured for D4 Frame format, the
terminal displays N/A.
• BPV - An asterisk displays under the BPV if the DS-1
detects bipolar violations.
• SLIP - An asterisk displays under the SLIP if the DS-1
detects frame slips. This is caused by multiple clock
sources in the application.
• FER - An asterisk displays under the FER if the DS-1
detects frame bit synchronization errors.
Remote Port
R
EMOTE
P
ORT
displays the status of activity on the Control In
remote port. This is useful for troubleshooting
communication sessions, and for verifying cabling.
• RX -Characters received at remote port
• ID - Unit ID received at remote port
• CRC - Correct CRC received
• PC - Correct passcode received
• TX - Characters transmitted from the remote port
Clear Port Alarm
Clears the L
INK
F
AILED
alarms on option modules that have
been removed from the TDU 120e chassis.