
Chapter 1 Product Description IP6704A TDMoEthernet
Loop Telecommunication International, Inc.
2
Loop Resistance
1800
DC
impedance
(ON-HOOK)
> 1M
DC
impedance(OFF-H
OOK)
235
@ 25mA feed
90
@ 100mA feed
FXS Ringing
Support 2 REN per port (1 REN = 6930
+ 8
F)
20 Hz, other frequencies: 16.7Hz, 25 Hz, 50Hz (Jump selectable)
78 Vrms (sine wave) (45 Vrms to 86 Vrms wide range by Resistor
selectable)
2 sec on 4 sec off, or 1 sec on 2 sec off optional for PLAR
Metering Pulse
12KHz/ 16KHz
Power: 10dBm
Sensitivity: -27dBm (-21dBm to -45dBm by Resistor selectable)
Signaling
Loop Start, GND-Start, Metering Pulse (12KHz, 16KHz), DTMF,
Dialing Pulse, PLAR,
Battery Reverse (supports Line Reverse Signaling for Billing)
All in-band signaling tones are carried transparently by the digitizing process.
Customer is responsible for in-band signaling compatibility between a telephone
and a switch, or between a PBX and a switch.
Voice Card (QFXSA)
Quad FXSA voice card (4 FXS per plug-in)
Connector
1, 2, 3, or 4 FXS per RJ11 connector
Alarm
Conditioning
CGA busy after 2.5 seconds of LOS, LOF
Encoding
A-law or
-law, user selectable
AC impedance
Balanced 600 or 900 ohms (user selectable)
Longitudinal
Rejection
55 dB
Gain Adjustment -21 to +3 dB / 0.1 dB step for transmit (D/A) & receive (A/D) gain
Signal/
Distortion
> 46dB with 1004 Hz, 0dBm input
Frequency
Response
±
0.5 dB from 300 to 3400 Hz, coincide with ITU-T G.712
Loop Feed
±48Vdc with 25mA current limit per port
Jumper Selectable: 25mA, 30mA, 35mA
Ringing
Support 2 REN per port (1 REN = 6930
+ 8
F)
16.7Hz, 20Hz, 25 Hz, 50Hz (user programmable)
Default 78 Vrms (sine wave) (64 Vrms by Jumper setting)
2 sec on 4 sec off, or 1 sec on 2 sec off optional for PLAR (user
programmable)
Metering Pulse
12KHz/ 16KHz (2.4Vrm/1Vrm user programmable)
Signaling
Loop Start (Metering Pulse, DTMF, Dialing Pulse, PLAR),
GND-Start (Tip Open, Ring GND), OOS Alarm, Battery Reverse
All in-band signaling tones are carried transparently by the digitizing process.
Customer is responsible for in-band signaling compatibility between a telephone
and a switch, or between a PBX and a switch.