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SDSL
SDSL HDSL T1 HDSL E1 Line Drivers Interface Converters Modem Eliminators Port Sharing Units Mini Line Drivers TRI-PAK Space Saver

 

 

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SDSL 768Kbps MODEM

Single Pair Copper Modem...Save Your Investment in Copper Cabling!

Call AIRLINX Toll Free 1-888-224-6814
E-mail: sales@airlinx.com

Red_Ball22F4.gif (916 bytes)SDSL 768Kbps MODEM OVER SINGLE TWISTED PAIR

Red_Ball22F4.gif (916 bytes)SDSL OFFERS INTERFACES TO MEET THE CUSTOMERS NEEDS   

 Red_Ball22F4.gif (916 bytes)SDSL FEATURES AND BENEFITS

Red_Ball22F4.gif (916 bytes)SDSL SPECIFICATIONS

MODEL 1257 SDSL MODEM

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DEI's Model 1257 SDSL 768Kbps Modem transfers symmetric data over a single twisted pair copper wire, driving data at distances up to 13,000 ft.  The DSL advanced electronics combined with complex 2B1Q technology provides DEI's Model 1257 with high performance fiber quality data transfers.

The modems operate in pairs with a Central unit and a Remote unit.  The Model 1257 modems automatically configure and synchronize when powered allowing quick, easy, plug 'n play connections.

From the front panel, select from the push button controls to run common testing features.  The front panel LED indicators display testing, and maintenance functions.   More comprehensive system monitoring and diagnostics can be performed by using the maintenance port via the RS-232 (DB-9) on the front panel.

The units accommodate a 110/220 VAC power source using DEI's plug-in power module or can receive a direct connection of 48 VDC source.  The Remote unit can be powered by the Central Unit through the SDSL line..

Model 1257 offers V.35 or RS-530 interfaces to connect customer equipment to meet various interface applications.  The rear panel accommodates a copper line connection of RJ-45 or 2-wire screw down.

V.35 Interface - The V.35 provides a M-34 female connector that maximizes the use of network equipment with superior performance.  The V.35 interface is a common connection between routers, terminals, bridges and controllers, where V.35 standards are required.
RS-530 Interface - The RS-530 provides a DB female connector.  This interface is ideal for multiplexors, and video where RS-530 standards are required.

Features and Benefits

Red_Ball22F4.gif (916 bytes)The Model 1257 transmits 768Kbps data rates across single pair copper wire up to 2.5 miles (13,000 ft). 
Red_Ball22F4.gif (916 bytes)Model 1257 offers front panel LED status, RS-232 maintenance port, diagnostic loop backs and self tests to support quick and easy diagnostics.
Red_Ball22F4.gif (916 bytes)SDSL employs 2B1Q technology with echo cancellation, and does not require removal of bridge taps that may exist in leased or private analog lines.
Red_Ball22F4.gif (916 bytes)SDSL utilizes existing copper infrastructure allowing quick installations without the need for costly fiber optic cabling.
Red_Ball22F4.gif (916 bytes)Install SDSL in your campus area networks for LAN/WAN connections, Video Conferencing, Distance Learning, Internet Access, PBX Network and Voice Traffic Distribution.

Specifications

Start Up Time Less than 28 Seconds Maximum Per Attempt

SDSL

Line Single Line Twisted Pair, 120 Ohm characteristic impedance
Signal Format Full Duplex 784Kbps Per Pair, SDSL-2B1Q Code
Drive Distance 2.5 Miles (4km) on 24 AWG, 2.3 Miles (3.7km) on 26 AWG
Transmit Signal Power 13.4dBm (min), 14.0dBm (max)
Transmission Delay One Way <200uSec
Return Loss 18dB 10kHz @ 125 Ohms
Loop Provisioning Loss 30dB @ 500kHz
LineTerminationConnector 2 Position Screw Terminal & 8 Position Modular Jack (RJ-45)
Data Rate 768Kbps

Maintenance

Diagnostics Local Loop, Remote Loop, Self Test
Maintenance Port SDSL Line Status, Interface Line Status, System Status, 24hr-@ 15 minute intervals and 100 day Performance
Front Panel LED monitoring indicators, Push button reset, Loop Back, Testing
Rear Panel RJ-45 Line Terminator, 2-wire Screwdown Line Terminator, Power Connector, DTE Interface Connector
Power and Dimensions
Power Requirements 100-250 VAC, 50-60 Hz or local 48 VDC
Power Consumption Central and Remote units locally powered, 5 watts each.  Central unit supplying line power to Remote unit, 17 watts.
Dimensions 1.52"H x 5.57"W x 9.75"D
Weight 2.2 lbs.
Operating Temperature 0-50 degree C
Humidity 90%, non-condensing

DTE Interface

Connector V.35 is a M-34 Female, RS-530 is a DB-25 Female
Clock Selection Front Panel Selectable Internal, External, Recovered

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Last modified: March 03, 1999