Consumer Electronics > Mobile Phone Accessories >  VTEL VOICE & DATA MULTIPLEXERS


Place Of Origin:
Contact Person:
Mr. Dharmarajan S
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Detailed Description


General Information
The system provides toll quality speech for two telephone lines and one data service over a point-to-point radio link at a net rate of 19.2kbps. .

Voice Coding
The technology used is state-of-the-art digital voice encoding and modulation to provide the best voice quality and be spectrum efficient at the same time. Recently approved coding techniques (G.723) allow toll quality with a bit rate of only 6.4Kbps.

The equipment is transparent to the user's telephone and supports both DTMF and loop disconnect (rotary/pulse) dialing from the remote end without alteration.

Pay Phones
It provides options for equipment to support payphone operation. Payphone option includes provisions for 12 or 16 KHz SPM metering and/or polarity reversal as needed.

Line Interface
The line interface equipment is capable of being configured for 2-wire subscriber loop or 2-wire or 4-wire E&M by internal modules.

The equipment is compatible with FXO, FXS, 2 wire, 4 wire and hotline systems by changing modules and/or internal jumpers and switches.

The audio response and general parameters conforms to CCITT specifications.

Voice Channels Characteristics 
Voice Channels Two
Digitizing TechniqueMP-MLQ, CCITT G.723
Acceptable Channel Bit Error 1x10-3 or Better Rate
Analog Interface2-wire FXO
2-wire FXS
2-wire/4-wire E&M
Fax OperationFax relay
Fax Speed4.8kbps voice rate 6.4kbps
Impedance600 ohm nominal

FXS Interface EIA RS-464, loop start
Nominal Impedance 600 Ohms
Return Loss (300 to 3400 Hz)Better than 20 dB
Loop Voltage 40V DC
Loop Current 25 mA
Ringer 50Vrms(±10%)

FXO Interface
EIA RS-464, loop start
DC Impedance 50 ohm
AC Input Impedance 600 ohm
Return Loss Better than
DC Resistance 0 to 100 VDC: more than 10M ohm
AC Impedance 15.3 to 68 Hz, 40/150 Vrms: 20k ohm
Ringer Equivalence Number 0.4 REN
Ring Detect Range 40 to 150 Vrms, 15.3 to 68 Hz
Transformer Isolation1500 Vrms

DATA Channel RS-232
Data Rate 4800bps

E&M Interface 
Signaling Interface EIA RS-464 Type I
Modified EIA RS -464 Type I,II,III,V
British Telecom SSDC5
Analog Interface 4-wire of 2-wire interface, strap selectable
AC Impedance 600 ohms
Transformer Isolation 1500 Vrms

Diagnostics Remote loop and BERT on the data channel, or tone injection on the voice channel.

We have important business in the overseas market due to our high quality and reasonable prices. Also,we can supply COMMUNICATION PRODUCTS according to customers’ requirements!We can also produce according to your requirement.We carefully select material of each part to promise our products quality.If you have any problems about details please contact us.

Company information:
    TELENET SYSTEMS PVT LTD was established in 1990. We is an exporter of India Other Mobile Phone Accessories products.    Our products always sell well in the worldwide markets, including North America South America Eastern Europe Southeast Asia Africa Oceania Mid East Eastern Asia Western Europe. With this way we can offer the best prices and quality to our customers!    To pursue high quality and meet customers' demands are our perpetual promises. We sincerely invite you as our good friends to visit us.Visit our website to see other product!
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Send Inquiry to this Supplier
Mr. Dharmarajan S
2, Mani Bhuvan, Cama Road, Ghatkopar W

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