Signaling module electrical specifications

Common specifications (United States version)

The following specifications apply to Part Numbers 5399, 5593, 5551, and 5549 rev D.1 and higher:

Specification	Line interface type
	Loop start	Subscriber loop	DID
Connectors	1 four-ganged, four-position modular connector (4 RJ-14x jacks).	1 four-ganged, four-position modular connector (4 RJ-14x jacks).	1 four-ganged, four-position modular connector (4 RJ-14x jacks).
Return loss (ref. 600 Ohms +2.2 uF standard)	20 dB min. (ERL)	20 dB min. (ERL)	20 dB min. (ERL)
Four to two wire gain Tolerance	+/- 1 dB	+/- 1 dB	+/- 1 dB
Four to two wire gain range	+6 to -6 dB	+6 to -6 dB	+6 to -6 dB
Two to four wire gain tolerance	+/- 1 dB	+/- 1 dB	+/- 1 dB
Two to four wire gain range	+6 to -6 dB	+6 to -6 dB	+6 to -6 dB
Frequency response 300 Hz - 3200 Hz. Reference to 1 kHz	+/- .8 dB	+/- 1 dB	+/- 1 dB
Trans-hybrid loss	17 dB min. @ 300 Hz-3.0 kHz into 600 Ohms + 2.2 uF	17 dB min. @ 300 Hz-2.5 kHz into 600 Ohms + 2.2 uF	17 dB min. @ 300 Hz-2.5 kHz into 600 Ohms + 2.2 uF
Signal overload level	+3 dBm at 0 dB gain	+3 dBm at 0 dB gain	+3 dBm at 0 dB gain
CMRR	> 80 dB	> 50 dB	> 50 dB
T-R input impedance (300 - 3200 Hz)	Voice band 600 Ohms +2.2 uF standard	600 Ohms +2.2 uF standard	600 Ohms +2.2 uF standard
Idle channel noise through connection	< 20 dB rnC	< 20 dB rnC	< 20 dB rnC
Crosstalk transmit to receive channels	< -70 dB @ 1 kHz	< -70 dB @ 1 kHz	< -70 dB @ 1 kHz
T-R isolation to SELV	>1500VRMS	Not applicable.	Not applicable.
Off-hook detect	Guaranteed Detect: Current > 10 mA Guaranteed No Detect: Current < 3.3 mA	Guaranteed Detect: Current > 13 mA Guaranteed No Detect: Current < 7 mA	Guaranteed Detect: Current > 13 mA Guaranteed No Detect: Current < 7 mA
Operating loop current	18 mA to 70 mA	13 mA to 31 mA	13 mA to 31 mA
Loop current and polarity detect	Single bit indicates if the current is flowing from Tip to Ring or Ring to Tip.	Not applicable.	Not applicable.
Ring detection	Guaranteed Detect: 30 VRMS 17 - 33 Hz (US version) Guaranteed No Detect: No detect <15 VRMS (0 - 5 kHz)	Not applicable.	Not applicable.
Maximum cable distance:	Not applicable.
At 48 V, 24 AWG		18,000 feet (5 km) (1800 Ohms)	18,000 feet (5 km) (1800 Ohms)
At 30 V, 24 AWG		2,000 feet (600 m) (600 Ohms)	Not applicable.
Maximum ringer equivalence load	Not applicable.	1.5	Not applicable.

European models change only where required to conform to regulation TBR21 (loop start only). For example, T-R input impedance is 270 Ohms in series with a parallel combination of 750 Ohms and 150 uF.