9
ATL User Guide
OM25 O
Optical M
Modem
1
1
INTRODUCTION
This User Guide applies to the OM25 optical modem designed and manufactured by ATL Telecom
Limited in the U.K. It provides guidance for installation, commissioning and operation of the
modem as well as reference information covering maintenance, specification and compliance.
OM25 is an optical standalone modem providing a single V35 or G703 interface to the user. It
delivers framed & unframed E1, fractional E1 and N*64kbps services. Protocol conversion (e.g.
G.703 at the CO and V.35 at the CPE) is handled automatically.
The OM 25 Long Haul version can transmit data typically up to 75km. The OM25 Short Haul version
can transmit data typically up to 15km.
Management control is provided locally via the RS232 connector. Alternatively the OM25 can be
set-up locally using the loop buttons on the front of the unit.
Power is via a universal 85 to 250V ac connector or a -48V dc connector.
Figure 1 OM25
Summary of Contents for OM25
Page 1: ...OM25 USER GUIDE...
