Digicom Modem LCM16P User Manual

Telematics  
Base Band modem  
& Modem  
Eliminator...  
LCM16P is a complete and reliable base bandmodem to  
beusedinpointtopointandmultipointcommunicationson  
2and4wiresleasedlines, infullduplexandhalfduplexwith  
fixed and controlled carrier. This modem is suitable for  
any telematic environment, for building, campus and  
local loop needs.  
LCM16P is compatiblewith any base band modem, it can  
be used on leased lines which are lent by your public  
manager, owner of the lines themselves.  
It is easy to programand it is in conformity withITU-T V54  
recommandation for diagnosticmanagement and tele-  
management, in point to point and multipoint mode.  
This product comes from ASIC digicomtechnology used  
forDCE1(completelydigital modemfor CDNnetwork)and  
it is carried out also into version at 64 Kbit for special  
connections(LCM16P64) at high speed in local point to  
point environment without cascade connections.  
TechnicalFeatures  
l Base band modem with phase modulation 2 levels ITU-  
T compatible  
l Full duplex and half duplex with 4 wires line and half  
duplex with 2 wires line  
l Working on point to point and multipoint networks  
l Management of fixed and controlled carrier  
l Automatic line equalizer  
l Automatic speed detection for cascade  
connections.  
l V24/V28 interface on DB25 connector  
l Speeds: 225, 300, 450, 600, 900, 1200, 1800,  
2400, 3600, 4800, 7200, 9600, 14400,19200 bps  
l Speeds: 24000, 32000, 38400, 48000 and 64000 bps on  
special version only  
l Synchronous and asynchronous working with formats  
up to 11 bit  
l Time Out circuit for carrier stop in multipoint due to  
fixed RTS for more than 32 Kbit  
l C105/C106 delay: 0, 16, 32, 64, 128, 256, 512 bit  
time  
l Line impedance: 150 or 600 ohm balanced  
l Transmission level: from -6 to + 6 dBm  
l Receiver from + 6 dBm to threshold level  
l C109 threshold: -30 or -40 dBm with  
hysteresis > 2 dB  
l C109 delay: off-on equal to 12 bit-time; on-  
off equal to 17 bit-time  
Base Band modem & Modem Eliminator...  
are made in Italy products, projected and  
manufactured by digicom S.p.A. leading company  
on the market for twenty years with  
Quality Certification according to  
ISO9001/EN29000 andBABT.  
The products are homologated, marked and  
they are in conformity with ITU-I recommendations  
warranting thehighest Quality level.  
THIS DOCUMENT IS SUBEJCT  
TO CHANGE WITHOUT NOTICE  
BANDBASE 17/02/97  
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