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OCU DP O
PTION
M
S
ODULE
PECIFICATIONS
2
• PRT/LCL bidirectional loopback toward the TSU
Network Interface (NI) and the DSU/CSU
• Zero code suppression
• Quality monitor/auto line disconnect
• Latching Loopback enable/disable
• Selectable hardware/software algorithms for
Switched-56 operation
• Interface Connector-RJ48C
The 19.6 kbps feature is patented by INC, patent
#4,862,480. The 45 dB range feature is patented by
ADTRAN, patent #4,759,035. The quality monitor/
auto line disconnect feature is patented by ADTRAN,
patent #5,450,441.
Loop Interface
Data Rate
Signal Format
TX Output
Amplitude
TX/RX Source
Impedance
Dynamic Range
Sealing Current
61200.068L1-1C
4-wire (TX Pair and RX Pair)
2.4, 4.8, 9.6, 19.2, 38.4, 56 kbps
including secondary channel rates
and 64 kbps (clear channel)
Bipolar, return-to-zero, 50% duty
cycle
±1.5V peak ±10% for rates 2.4, 4.8,
19.2, 38.4, 54 and 64 kbps
±0.75V peak ±10% for 9.6 kbps
135 Ω ±20%
0 to 45 dB loops loss for all rates
measured at a frequency of half
the data rate
4 to 20 mA DC with polarity re-
versal capability
November 1996
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