ABB ETL600 - Page 376

Technical Data ETL600 Rel. 1 ABB Switzerland Ltd
AUDIO FREQUENCY SERVICES
Application Transparent transmission of analog voice-frequency signals like speech, teleoperation,
VFT-modems, facsimile.
Number of channels Up to 3 AF channels with 4 kHz bandwidth each, or
3 channels of 3.2, 2.4 and 2.4 kHz bandwidth respectively, in 8 kHz total bandwidth
For the transparent transmission of speech plus superimposed teleoperation signals
Frequency offset ≈ 0 Hz
Number of speech channels up to 3 (one in each AF channel)
Speech low-pass filter cut-off frequency 2.0 kHz to 3.4 kHz, programmable in steps of 200 Hz
Speech limiter + 3 dBm0
Speech compander on/off; according to ITU G.162
Telephony
4-wire PAX interface with E&M
Impedance 600 Ohms, balanced
Transmit level range -20 to +5.5 dBm
Receive level range -20 to +4 dBm
2-wire subscriber interface (FXS)
Impedance 600 Ohms, balanced
Receive level range -17 to +4 dBm
Transmit level range -17 to +1 dBm
Ringing frequency 25 or 20 Hz, programmable
Ringing voltage 50 Vrms open circuit;
≥ 36 Vrms across 2.333 kOhm load
DC loop voltage 48 VDC ± 15% open loop
2-wire PAX interface (FXO)
Impedance 600 Ohms, balanced
Receive level range -17 to +4 dBm
Transmit level range -17 to +1 dBm
Ringing voltage detection range 20 to 130 Vrms / 17 to 55 Hz
Service telephone
Connector for 2-wire telephone set RJ11 on front panel
Teleoperation
Number of ports 3 for each AF channel, up to 9 total
Impedance 600 Ohms, balanced
Input level -20 to +4 dBm
Output level -20 to +8 dBm
Transit filters
Standard filters 3 programmable digital bandpass filters per AF channel
Cut-off frequencies selectable in steps of 60 Hz
Group delay equalized transit filters Bandpass for teleoperation band above speech
or 3’600 Hz lowpass
DATA SERVICES
Narrowband data (NSK600)
Application Data transmission in bandwidth of less than 4 kHz, in point-point or point-multipoint
applications (e.g. polling SCADA)
Number of narrowband modems up to 4
Programmable bandwidth and data rates:
100 Bd
200 Bd
narrow
200 Bd
wide
600 Bd
1’200 Bd
V.23
1’200 Bd
narrow
2’400
bps
4’800
bps
9’600
bps
Operational data rate [bps]
≤ 150 ≤ 225 ≤ 300 ≤ 600 ≤ 1’200 ≤ 1’200
2’400 4’800 9’600
Data format transparent transparent transparent transparent transparent transparent UART UART UART
Nominal bandwidth [Hz]
(= channel spacing)
240 360 480 960 2’400 1’640 840 1’680 3’360
Center frequency steps [Hz] 60 60 60 60 n.a. n.a. 60 60 n.a.
1KHW001498-EN Edition 2005-11-11 2 / 4