TM
1
7925-A2-GK40-10
September 1997
HotWire 7925-A1 E1 HDSL Standalone Termination Unit
Errata
Document Number 7925-A2-GK40-10
September 1997
Errors and exclusions in the User’s Guide (Document No. 7925-A2-GB20-30) were detected after
printing. Please make note of the following corrections.
The following information should be included on page 1-1: Up to ten standalone units may be installed in
an optional HotWire 7900 10-slot Standalone Shelf, using a single power source. (The Standalone Shelf
is required for the –48 Vdc standalone model.)
The defaults shown on page A-2 are Terminal mode factory defaults. Switchpack mode defaults are
shown in this document.
Use the following illustration rather than the one on page C-2:
97-15266-03
P1
1
Switchpack S1
VT100 Terminal
Modular Jack
Jumper P11
S1
HDSL Line Jack
P3
C31
C33
Position
1
2
3
4
5
6, 7
8
Settings*
OFF = CP
ON = CO
OFF = AMI line
encoding
ON = HDB3 line
encoding
OFF = Loops A and B
ON = Loop A
Must be OFF when
in Switchpack Mode
OFF = 75 ohm line
build-out
ON = 120 ohm line
build-out
Must be OFF when
in Switchpack Mode
OFF = Unframed
ON = Framed
Pins*
1-2
2-3
Settings*
Terminal Mode
Switchpack Mode
Jumpers C31, C33
Pins*
1-2
2-3
Settings*
75 ohm line
build-out
120 ohm line
build-out
* Default in bold
P6
P7
Jumpers P6, P7
Pins*
1-2
2-3
Settings*
120 ohm line
build-out
75 ohm line
build-out
678
ON
12345
1 2 3
1 2 3
P10
P1
1 2
123
P9
P8
P12
1 2 3
1 2 3
3 2 1
3 2 1
3 2 1
3 2 1
1 2 3
Figure C-1.
G.703-Compatible Unit Switchpack and Jumper Locations
