Specifications for the Four

encor e!n etworks
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TM
Version A.1, January 2013
© 2013 Encore Networks, Inc.
All rights reserved.
Specifications for the Four-Wire E&M
Card
This document lists specifications for the four-wire E&M card. (The four-wire E&M card is
available for the BANDIT III.)
A.1
Four-Wire E&M Voice
Table A-1. Four-Wire E&M Connector Pinout (RJ48)
Pin
1
2
3
4
5
6
7
8
Signal
SB
M-Lead
RXTXTX+
RX+
E-Lead
SG
Description
Signal Battery
Audio In Audio Out Audio Out +
Audio In +
Signal Ground
Table A-2. Audio Parameters
Parameter
Maximum Output Level
Maximum Input Level
Nominal Input Impedance
Nominal Output Impedance
Gain Adjust Transmit/Receive
Gain Adjust Steps
Idle Channel Noise, C-Message Weighted
Idle Channel Noise, Psophometric Weighted
Frequency Response, 300 Hz to 3,000 Hz
Isolation
For information on trademarks, safety, limitations
of liability, and similar topics, see Notices.
Value
+1.5 dBm
+4 dBm
600 ohm
600 ohm
±7 dB
±0.5 dB
< 18 dBrnc0
< -74 dBm0p
±0.2 dB
4,000 V
Home Module: PCM Voice Network
Document A
Page 2
PCM Voice Network, Document A
Table A-3. Signaling Parameters
Parameter
E&M Signaling Type
Configurable Signaling Type
Input Signaling Detector Resistance
Input Signaling Detection Voltage
Maximum Output Signaling On Resistance
Maximum Output Signaling Off Resistance
Maximum Output Signaling Current
Output Signaling Voltage
E&M Circuit Isolation
A.2
Value
I, II, III, IV, or V
Trunk Circuit or Signaling Unit
4.02 k-ohm
-24 V to -60 V
20 ohm
1 G-ohm
35 mA
-20 V to -60 V
4,000 V
E&M Signaling Types
The following diagrams illustrate the four-wire E&M signaling circuits used in the
BANDIT III.
Note: Trunk and signaling facilities must share common ground in Type III and Type V.
(Use Auxiliary Connector Pin 2.)
Figure A-1. Four-Wire E&M Type I Signaling
Specifications for the Four-Wire E&M Card
Figure A-2. Four-Wire E&M Type II Signaling
Figure A-3. Four-Wire E&M Type III Signaling
Note: Trunk and signaling facilities for Type III must share common
ground. (Use Auxiliary Connector Pin 2.)
Page 3
Page 4
PCM Voice Network, Document A
Figure A-4. Four-Wire E&M Type IV Signaling
Figure A-5. Four-Wire E&M Type V Signaling
Note: Trunk and signaling facilities for Type V must share common
ground. (Use Auxiliary Connector Pin 2.)
Page 5
Specifications for the Four-Wire E&M Card
A.3
Auxiliary Input and Output Signals for Four-Wire
E&M
The auxiliary input–output signals are multipurpose—for example, an auxiliary signal can
be used for external alarm detection and generation. Battery voltage is selectable 5 V (used
by auxiliary signals) or -48 V (used by E&M signaling). Figure A-6 and Figure A-7 illustrate
equivalent auxiliary in and out circuits.
Table A-4. Auxiliary Connector Pinout (8-Pin Phoenix)
Pin
1
2
3
4
5
6
7
8
Description
Battery Voltage
Battery and E&M Signaling Return
Aux In 1
Aux In 2
Aux In 3
Aux In 4
Aux Out 1
Aux Out 2
Table A-5. Auxiliary Input–Output Signals
Signal
Minimum
Nominal
Maximum
Battery Voltage (Option 1), default
-44 V
-48 V
-52 V
Battery Voltage (Option 2)
+4.5 V
+5 V
+5.5 V
Battery Power (Option 1), default
1.5 W
Battery Power (Option 2)
1W
Auxiliary In, Resistance
2 k-ohm
Auxiliary In, On Voltage
-24 V
2.5 V
Auxiliary In, Off Voltage
open
3V
Auxiliary Out, Off Voltage
Auxiliary Out, Off Resistance to +5 V
Auxiliary Out, On Voltage
Auxiliary Out, On Resistance to GND
Auxiliary Out, On Sink Current
+24 V
+5 V
4.02 k-ohm
0V
20 ohm
50 mA
Page 6
Figure A-6. Auxiliary In Equivalent Circuit
PCM Voice Network, Document A
Figure A-7. Auxiliary Out Equivalent Circuit

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