363-206-305
Technical Specifications
10-76
Issue 3 June 2000
Tabl e 10-34.
SPQ
®
400 Environmental Specifications
Temperature Range (Ambient)
Operating
−
40
°
to 85
°
C (
−
40
°
to 185
°
F)
Storage
−
40
°
to 85
°
C (
−
40
°
to 185
°
F)
Relative Humidity, Noncondensing
5% to 95%
Ta bl e 1 0-3 5 .
SPQ
®
440 Electrical and Transmission Specifications
Value
Parameter POTS Special Services
Loop resistance (excluding telset) 0 to 900
Ω
CSA
Loop current 20 mA to 30 mA 25 mA to 30 mA
VF loss, off-hook, between CO and network interface
(NIF) at customer location
4 to 8 dB 2 to 5 dB
Nominal 1,000Hz loss,
SPQ440
only:
0
Ω
tip-to-ring
Maximum loop resistance
6.0 dB
1.4 dB
3.4 dB
0 dB
VF loss, on-hook, between CO and NIF at customer
location 9 dB to 13 dB 7 dB to 12 dB
Return loss at COT (reference Z of 900
Ω
+
2.16
µ
F,
terminated with 900
Ω
+
2.16
µ
F for POTS or TR-57
CSA test loops for special services)
ERL > 18 dB
SRL > 10 dB
ERL > 10 dB
SRL > 5 dB
Return loss at RT (reference Z of 600
Ω
+
2.16
µ
F, CO
terminated with 900
Ω
+
2.16
µ
F)
ERL > 22 dB
SRL > 14 dB
ERL > 22 dB
SRL > 14 dB
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