User guide

ASCOM USER GUIDE
High Speed Base Band Modems
9
2.1 INTRODUCTION
All versions of the High Speed Base Band Modems provide synchronous communication of
data over twisted copper pair(s).
The AM64/128EA unit operates at 64Kbps and 128Kbps over a single pair.
The AM64/384A unit operates from 64Kbps to 384Kbps over a single pair.
The AM64/512A unit operates from 64Kbps to 512Kbps over a single pair.
The AM64/768A unit operates from 64Kbps to 768Kbps over two pairs.
The AM64/1024A unit operates from 64Kbps to 1024Kbps over two pairs.
Throughout the document, reference will be to “single pair” and “two pair” modems.
Wherever the term “single pair modem” is used, it applies to any of the following:
AM64/128EA, AM64/384A, AM64/512A.
Wherever the term “two pair modem” is used, it applies to the following:
AM64/768A, AM64/1024A.
The modems optimise their transmission characteristics for each line rate so a reduction in the
data rate will enable transmission over a greater distance.
They can be easily configured from either the front panel controls or a VT100 terminal, and
are available in a range of user interface options. The interfaces currently available are:
• X.21 15-way D-type socket
• X.21 bis 25-way D-type socket
• V.35 34-way MRAC socket
• V.36 37-way D-type socket
• RS.530 25-way D-type socket
• G.703 (64kbps 120ohm ) 9-way D-type socket
• Ascom Bridge Router with10BaseT 8-way RJ-45 socket
2 SYSTEM DESCRIPTION
2
8 ASCOM USER GUIDE
High Speed Base Band Modems