CTC Union EOe-1, Руководство пользователя

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Chapter 1. Introduction
10
1.6 Functional Description
The
EOe-1
is a single port access unit for Unframed E1
only . The
EOe-1
AC model has a universal, auto-switching
power supply (90~250VAC) while the DC model's internal DC-
DC module accepts DC voltages from 18 to 72 volts.
The
EOe-1
WAN supports user-selectable speeds, which
halves the main E1 rate of 2.048Mbps, down to a minimum of
16Kbps. The E1 line is fully compliant with the ITU-T G.703
standard and has a receive sensitivity of up to -43 dB on twisted
pair or coax cable. This provides an approximate operating range
up to 2km (using 22AWG twisted pairs).
The
EOe-1
also fully meets other E1 specifications
including ITU-T G.823 for jitter.
The
EOe-1
is capable of performing local and remote loop
back. The operator at either end of the line may test both the
EOe-1 and the line in the loop back mode. The loop back is
controlled by a manual push-button switch.
A front panel switch generates an internal 511 bit pseudo
random test pattern, according to ITU-T, for direct end-to-end
integrity testing. The Err indicator flashes for each bit error
detected.
The
EOe-1
unit is built in a compact case that can be placed
on desktops or shelves or installed, by means of an appropriate
adapter, in a 19" rack. (please see Chapter 2)