Issue 6
Electra Elite
5 - 38
Installing Electronic Telephone Units
Controlled Slip Event Detection (SLIP)
If the timing difference between a synchronous
receiving terminal and the received signal exceeds
the buffering ability of the terminal, the LED is red.
Cyclic Redundancy Check (CRC) Error Event
Detection
When a CRC Error occurs, the LED lights red.
Excessive Bipolar Violation (BPV) Detection
When excessive BPV is detected, the LED lights
red.
Line Synchronization Alarm (LSA) Detection
When an FT1 trunk loses frame synchronization, the
LED lights red.
Out-of-Frame (OOF) Condition Detection
When two of the four or five framing data bits
received are in error, the LED lights red.
Remote Alarm Indication (RAI) Detection
When RAl is received, the LED lights red.
4.6.6
Connectors
The DTI ETU-U10/20 has one connector:
CN1
Connects to the backboard
4.6.7
Connections
Figure 5-23 DTI-U10/20 ETU Connections
TELCO
T1
Provider
CSU/DSU
MDF
TA
TB
RA
RB
Summary of Contents for Electra Elite 192
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