Lucent Technologies FiberReach DDM-2000 - Page 548

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Technical Specifications
10-74
Issue 3 June 2000
Tabl e 10-33.
SPQ
®
400 Electrical and Transmission Specifications
Parameter Value
Loop Resistance (excluding telset) 0
Ω
to 900
Ω
Loop Current 20 mA (900
Ω
loop) to 30 mA (0
Ω
loop)
VF loss, off-hook, between CO and network interface
(NIF) at customer location
4 to 8 dB
Nominal 1,000-Hz loss,
SPQ400
only:
0
Ω
tip-to-ring
900
Ω
loop resistance
6.0 dB
1.4 dB
VF loss, on-hook, between CO and NIF
at customer location
9 dB to 13 dB
Return loss at COT (reference Z of 900
Ω +
2.16
µ
F,
terminated with 900
Ω +
2.16
µ
F)
ERL > 18 dB
SRL > 10 dB
Return loss at RT (reference Z of 900
Ω +
2.16
µ
F, CO
terminated with 900
Ω +
2.16
µ
F)
ERL > 18 dB
SRL > 10 dB
Structural impedance 900
Ω +
2.16
µ
F
Minimum longitudinal balance (measured by
IEEE Method 455-1976)
200 Hz to 1,000 Hz:
≥
58 dB
3,000 Hz:
≥
53 dB
Idle channel noise, end-to-end
≤
20 dBrnC
Frequency response (loss relative to 1,004 Hz)
End-to-end
SPQ
400 only (1/2 channel)
400 Hz to 2,800 Hz:
−
0.5 dB to
+
1 dB
3200 Hz:
−
0.5 dB to
+
1.5 dB
300 Hz and 3,400 Hz:
−
0 dB to
+
3 dB
400 Hz to 2800 Hz:
−
0.25dB to
+
0.5 dB
3,200 Hz:
−
0.25|dB to
+
0.75 dB 300 Hz
and 3,400 Hz:
−
0 dB to
+
1.5 dB
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