Quad FXS Voice Module Specifications

Chapter 1. Introduction

ELECTRICAL SPECIFICATIONS

Power	6 Watts (off hook)
Loop Current	23 mA nominal
	20 mA minimum
Loop Resistance	1200 ohms nominal/1650 ohms maximum*
	(900 ohms/1350 ohms - line, 300 ohms - phone)
Loop Length	16 kfeet
Terminating Impedance	900 ohm + 2.16∝	F,
	600 ohm + 2.16∝	F,
	900 ohm, and 600 ohm
Return Loss	900 ohm + 2.16∝	F,
	ERL > 28 dB,
	SRL > 20 dB
Trans Hybrid Loss	900 ohm + 2.16∝	F,
	ERL > 28 dB,
	SRL > 20 dB
Longitudinal Balance	200, 500, and 1000 Hz: > 58 dB min., > 63 dB avg.
	3000 Hz: > 53 dB min., > 58 dB avg.
Frequency Response	300 to 3400 Hz: -0.5 and 1.0 dB
Idle Channel Noise	< 20 dBrnC
Signal-to-Distortion Ratio	0 to -30 dBm0: > 33 dB
	-30 to -40 dBm0: > 27 dB
	-40 to -45 dBm0: > 22 dB

PHYSICAL SPECIFICATIONS

Dimensions	3 1/4" H x 10" D
Weight	1 lb.

ENVIRONMENTAL SPECIFICATIONS

Operating Temperature	-40 to 64 °C
Storage Temperature	-40 to 70 °C
Relative Humidity	Up to 95% noncondensing

*Measured with -48 VDC input, 20 mA loop current

61175408L1

Octal FXS Voice Module User Manual

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