TxPORT Transport PRISM 3021, Руководство пользователя

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Installation 2-1 PRISM 3021
2. Installation
This chapter contains information and instructions required
to prepare the TxPORT PRISM 3021 for use. This chapter
includes initial inspection procedures, mounting instruc-
tions, configuration guidelines, connection instructions, and
powering information.
Throughout this manual, all factory default set-
tings are shown underlined.
Safety Summary
This manual contains information and warnings which must
be followed by the user to ensure safe operation and to
retain the equipment in a safe condition.
This WARNING sign denotes a poten-
tial hazard to the operator. It calls
attention to a procedure or practice which, if
not correctly performed or adhered to, could
result in injury or loss of life. Do not proceed
beyond a WARNING sign until the indicated
conditions are fully understood and met.
Follow proper electrostatic discharge (ESD) pro-
cedures while handling the circuit boards.
Unpacking and Inspection
Upon receipt of shipment, inspect the shipping container
and contents. If the contents of the shipment are incomplete
or, if there is mechanical damage or defect, notify TxPORT
Customer Service. If the shipping container or cushioning
material is damaged, notify the carrier and TxPORT imme-
diately and make a notation 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 completeness and the instrument has been
checked both mechanically and electrically.
Supplied Materials
The PRISM 3021 shipment contains the following items:
• PRISM 3021 unit
• Reference manual with configuration guide
• Adapter cables, if appropriate
Mounting
The TxPORT 3021 NTU/DSU is a modular unit that plugs
into either a single-unit housing or into a TxPORT 1051
chassis which holds up to 12 units.
The chassis can be installed in either a 19- or 23-inch rack
using four screws. Connections are made from the rear panel
of the chassis.
Unit Configuration
The PRISM 3021 can be hardware configured by switches or
software configured by using a terminal connection to the
front panel supervisory access (SUPV) port (see SUPV Port
Rate on page 2-3 to configure the port’s data rate and
Optional Equipment on page 1-4 for the appropriate cable
and adapter). The terminal interface provides more capabili-
ties than do the configuration switches. For terminal configu-
ration options, refer to Software Configuration on page 4-3.
In the event of power failure, the 3021 retains its configura-
tion in non-volatile memory. This feature allows the unit to
automatically restore normal service following a power loss.
See Utilities on page 4 -20 for more information.
The 3021 stores its operating firmware in Flash memory. If
a software upgrade is ever needed, TxPORT will provide the
hex files, the download program, and the downloading
instructions.
Hardware switches on the upper and lower sides of the cir-
cuit boards allow configuring most simple applications.
These switches are described in the following paragraphs. If
an ambiguous configuration is programmed, the unit over-
rides invalid configuration items. When power is applied to
the unit, front panel indicators STATUS, TST, and BV/CR/
FE flash for several seconds.
The unit is hardware configured using four DIP switches on
the upper side between the circuit boards (see Figure 2-2 on
page 2-2); one rotary switch and one DIP switch located on
the lower side (see Figure 2-5 on page 2-4); as well as jump-
ers located opposite the E1-DTE card (see Figure 2-6 on
page 2-5). Switch positions are numbered as follows: posi-
tion 2 of switch S3 is referred to as Switch S3-2, and so on.
Before installation, verify and record each configuration
switch setting on the removable configuration guide that is
included at the back of this manual.
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