363-206-305
Technical Specifications
Issue 3 June 2000
10-79
Tabl e 10-37.
SPQ
®
909 Electrical and Transmission Specifications
Parameter Value
DC Supervisory Range (including telset) 450
Ω
Loop Resistance (up to 500 ft. of AWG 22) 0
Ω
to 20
Ω
Loop Current 20 mA to 25 mA
Nominal 1,000-Hz VF loss off-hook
between CO and RT CUs
4 dB
SPQ
909 alone 4 dB
Nominal 1,000-Hz VF loss off-hook
between RT CUs and CO
2 dB
SPQ
909 alone 2 dB
Nominal 1,000-Hz VF loss on-hook
between CO and RT CUs
5.5 dB
SPQ
909 alone 4 dB
Nominal 1,000-Hz VF loss on-hook
between RT CUs and CO
3.5 dB
SPQ
909 alone 2 dB
Return loss at COT (reference Z of 900
Ω
+
2.16
µ
F, RT terminated with 600
Ω
)
ERL > 18 dB
SRL > 10 dB
Return loss at RT (reference Z of 600
Ω
, CO
terminated with 900
Ω
+
2.16
µ
F)
ERL > 26 dB
SRL > 21 dB
Hybrid Balance of
SPQ
909
(RT terminated with 600
Ω
)
ERL > 26 dB
SRL > 21 dB
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