Installation
2-1
1558A APS
Installation
2.0
General
Proper installation of the 1558A unit involves the following
key steps:
• Site Survey and Preparation
• Unpacking and Inspecting Equipment
• Equipment Mounting
• T1, Alarm, and Power Connections
• Setting Equipment Options
• Preservice Testing
The following paragraphs contain information and instruc-
tions to assist the user in preparing the 1558A for operation.
It is recommended that the user sequentially follow the site
preparation and unit installation steps described.
2.1
Site Preparations
The following site preparations should be performed before
starting installation of the 1558A APS unit. First, determine
the location of 1558A unit and perform the following:
A) Determine the distance from the APS unit to the AC
outlet, or if connecting to a DC external power source, the
distance to this source. The 1558A is shipped from the fac-
tory with a 110 VAC to -48 VDC wall transformer (10 ft.
cord). If external DC is being used, insure that 26 gauge
wire is on hand to wire the external DC power source to the
1558A unit. The maximum current draw of the 1558A is
≤
80 milliamps at -48 VDC.
B) Determine the distance from the T1 facility demark and
the actual location of the 1558A. After determining dis-
tance, verify that the proper cable lengths and types have
been ordered to connect from the T1 demark to the 1558A
unit. The 1558A is shipped with three RJ48 modular T1
cable, 10 feet in length.
C) Normally, the provider of the T1 facility will provide
the required LBO setting (transmit signal level) required for
connection to the T1 facilities. This value should be used
when setting the 1558A LBO transmit values (0, 7.5, 15, or
22 db) in the 1558A unit. If the value cannot be obtained
from the provider, the LBO transmit values for Path A and
Path B should be set to 0 db.
D) Determine the distance between the 1558A unit and the
terminating DTE equipment. This distance will be used
when you set the DSX transmit LBO value for the DTE T1
port on the 1558A unit. The maximum distance that the
1558A DTE DSX receive will operate is 1,400 feet (using
ABAM cable, 26 gauge, shielded wiring).
E) Verify that the T1 line is operating properly before you
attempt to install the 1558A unit. Both of the T1 lines
should be checked for error free operation for at least 1 hour
to insure that they are performing error free.
F)
If the unit is going to installed in a 19’ equipment be
rack, verify that there is enough rack space available in the
rack (requires 1.75 inches per 1558A unit). Four pan head
(type 12-24 x 1/2 inch) screws are provided for mounting
the unit. An optional 23” rack mount kit is available for
applications using this size rack.
G) Verify that no external CSUs (channel service units) are
installed at the location where the 1558A is being installed.
NOTE: The 1558A unit provides internal ESF CSU func-
tions and cannot operate properly if another CSU is also
co-located with the 1558A.
2.2
Unpacking and Inspection
This unit is carefully packaged to prevent damage in ship-
ment. Upon receipt, inspect the shipping container for dam-
age. If the shipping container or cushioning material is
damaged, notify the carrier immediately and make a nota-
tion on the delivery receipt that the container was damaged
(if possible, obtain the signature and name of the person
making delivery). Retain the packaging material until the
contents of the shipment have been checked for complete-
ness and the instrument has been checked both mechanically
and electrically.
If the contents of the shipment are incomplete or, if there is
mechanical damage or defect, notify TxPORT. If the ship-
ping container is also damaged, or the cushioning material
shows signs of stress, notify the carrier of the damage as
well as TxPORT. Keep the shipping materials for carrier’s
inspection. TxPORT will arrange for repair or replacement
without waiting for claim settlement.
2.3
Mounting
If the 1558A is to be installed in an equipment rack, simply
mount the 1558A in the equipment rack using the provided
mounting screws and rack mount adaptors (the 1558A can
be ordered with either 19” or 23” rack mount adaptors). If
the equipment is to be desk top installed, the user may
remove the provided rack mount adaptors and set the unit on
any flat surface. Once the equipment has been physically
located, the following rear panel wiring connections should
be performed.
