
5
12
The differences between the 200 and 210 CSU units are summarized as follows:
• Configuration switch S2 is found only on the 200 CSU.
• Position S1-7 (switch S1, position 7) is a spare on the 200 CSU.
On the 210 CSU, position S1-7 is used to enable the ‘Transparent’ mode.
• The front panel ‘FAR’ LED indicator is installed only on the 200 CSU.
1.1 Specifications
Network Interface
Line Rate: 1.544 Mb/s (± 50 bps)
Line Framing: D4 or ESF
Line Code: AMI or B8ZS
Line Impedance: balanced 100 Ω (± 5%)
Input Signal: DS1, +1 to -30 dB (ALBO)
Output Signal: 3.0 V, ±15%, base-peak into 100 ¾
Line Build Out: 0, -7.5, -15, and -22.5 dB attenuation
Line Protection: 1000 V lightning, fused input/output
Jitter Control: per TR62411 and T1.403
Pulse Density: per TR62411
Equipment
Interface
Line Rate: 1.544 Mb/s (± 50 bps)
Line Framing: D4 or ESF
Line Code: AMI or B8ZS
Line Impedance: balanced 100 Ω (± 5%)
Input Signal: DSX1 to 655 feet
Output Signal: Selectable DSX1 signal level from 0 to 655 feet
Line Protection: 1000 V lightning, input/output
DTE Line Coding: Position S2-3 sets the DTE line coding, including conversion.
A
- AMI B - B8ZS
Network Line Framing: Position S2-4 sets the CSU to the framing of the network
line. In the ESF mode, the unit responds to all T1.403 or 54016 messages.
A
- ESF B - D4
DTE Line Framing: Position S2-5 sets the CSU to the framing of the DTE line.
A - ESF B - D4
PRM: Position S2-7 enables/disables sending a PRM (performance report message)
during AIS. If the unit detects a loss of sync from the DTE, an unframed all ones signal
is generated to the T1 facility. If Switch S2-1 is set for T1.403 operation, the unit inter-
rupts the AIS signal with a PRM once a second.
A
- PRM enabled B - PRM disabled
TxPORT 210 CSU
Mode
NET
DTE
NET
DTE
Spare
PRM
54321 6 7
Mode
NET
DTE
NET
DTE
Spare
PRM
54016
AMI
AMI
ESF
ESF
Enable
T1.403
B8ZS
B8ZS
D4
D4
Disable
A
B
LOOP NORM
CSU
PWR DTE NET LOOP
PRODUCTIVITY SERIES 210
TRANSPORT
®
Configuration Switch S2
Note: This switch
is provided only on
the 200 CSU
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