RAD Data comm HCD-E1 - Manual (Page 20)

Chapter 1 - Introduction HCD-E1 Installation & Operation Manual
1-2 Overview 01/01/01 08:07
When you order a unit with a V.35, V.36/RS-449, or X.21 interface, you
receive a unit with the RS-530 interface provided with a corresponding
adapter cable.
HCD-E1 is available in the AC and DC versions.
The AC version is powered by 100 to 240 VAC, 50 or 60 Hz. As an option,
HCD-E1 can also be ordered with a -48 VDC power supply.
Note
In this manual, the generic term HCD-E1 is used when the information is
applicable to all HCD-E1 versions. Information applicable to a specific version
is explicitly identified.
Applications Figure 1-1 shows a typical application for HCD-E1. In this application,
HCD-E1 is used to connect the synchronous data channels over an HDSL
line, while the sublink is used to connect to a digital PABX trunk.
USER'S
DTE
USER'S
DTE
PABX
PABX
PABX
PABX PABX
E1 SUB LINK E1 SUB LINK
DATA CHANNELS
(nx56 kbps or nx64 kbps)
DATA CHANNELS
(nx56 kbps or nx64 kbps) HCD-E1
HCD-E1
HDSL LINES
USER'S
DTE
USER'S
DTE
Figure 1-1 Typical HCD-E1 Application
Features Statistics Collection
HCD-E1 offers extensive performance statistics collection capabilities:
•
E1 performance statistics. When operating with the CRC-4 option
enabled, HCD-E1 stores E1 line statistics in compliance with the
requirements of ITU-T Rec. G.706. The user can display the statistics
collected for the line connected to the E1 sublink of the local unit, as well
as for the link connected to the E1 sublink of the remote unit.
•
HDSL performance statistics. HCD-E1 stores performance statistics for
each of the two HDSL lines in compliance with the requirements of
ITU-T Rec. G.826.
Test and Diagnostics Capabilities
HCD-E1 has comprehensive diagnostics capabilities, which include the
following loopbacks:
•
Local loopbacks on the data channel and E1 sublink of the local HCD-E1
•
Local loopback on the HDSL lines