This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio frequencies. Operation
of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense.
WARNINGChanges or modifications to this unit not expressly
approved by the party responsible or compliance could
void the user’s authority to operate the equipment.
Table 3-ANormal Mode Operation (conditions which cause the
port control signal to be deactivated) ........................................ ...19
ii2nd GEN Nx56/64 Option Module User Manual61202.054L1-1
Chapter 1. Introduction
Chapter 1
Introduction
SECOND GENERATION (2ND GEN) NX56/64 V .35 OPTION
MODULE OVERVIEW
The Second Generation (2nd GEN) Nx56/64 V.35
option module is one of the option modules available for
use with the following ADTRAN equipment:
• TSU 100 (part number 1200052L1)
• TSU 600 (part number 1200076L1)
• TSU 120 (part number 1200129L1)
• HSU 100 (part number 1200097L1)
• HSU 600 (part number 1200098L1)
The 2nd GEN Nx56/64 V.35 option module installs in
the option slot of the TSU/HSU family of products and
provides an additional synchronous V.35 interface port.
When used in these products, this interface port allows
an additional DTE to have access to the T1 service.
2ND GEN NX56/64 V .35 PLUG-ON BOARD OVERVIEW
The operations of the 2nd GEN Nx56/64 V.35 option
module described in this manual are also applicable for
the 2nd GEN Nx56/64 V.35 plug-on board. Operation
of both is identical except for the physical installation.
61202.054L1-12nd GEN Nx56/64 Option Module User Manual1
Chapter 1. Introduction
THE FUNCTIONAL DESCRIPTION OF THE 2ND GEN NX56/
64 V .35 OPTION MODULE AND PLUG-ON BOARD
The 2nd GEN Nx56/64 V.35 option module operates in
the option slot of the TSU/HSU products while the plugon board operates as a plug-on to any option module.
Both are under the control of the TSU/HSU product.
The option module and the plug-on board are configured from the front panel or by an external PC program.
The internal menus for their configuration are part of
the option module and plug-on board and are automatically installed when either is plugged into a TSU/HSU
product.
22nd GEN Nx56/64 Option Module User Manual61202.054L1-1
Chapter 1. Introduction
FEATURES OF THE 2ND GEN NX56/64 V.35 OPTION MODULE
•Operates using 1 to 24 DS0s
•Includes an elastic store for absorption of rate
variations
•Capable of including a Nx56/64 V.35 plug-on
interface port, resulting in a dual port module
•Outputs a 50 percent duty-cycle output clock at all
rates
•Menu operation for easy configuration
•Executes and responds to V.54 looping codes
•Generates and checks a 511 test pattern
•Performs an extensive self test
•Supports multiport dial backup operation
•Provides inband channel network management
communication
Interfaces
•CCITT V.35 electrical (differential)
•Connector
V.35 Winchester
•Loopbacks
Port (toward the network)
DTE (toward the DTE)
Both loopbacks can be invoked locally or remotely
(V.54)
61202.054L1-12nd GEN Nx56/64 Option Module User Manual3
Chapter 1. Introduction
2nd GEN Nx56/64 (V .35) Option Module Specifications
DTE Interface
CCITT V.35 Synchronous
Rates
56 kbps to 1.536 Mbps in 56K or 64K steps
Clock Options
Normal, Inverted
Tests
Local Loopback (Bilateral)
Menu activated
Remote Loopback (V.54)
Menu activated
Self Test
Test Pattern
511 with errored seconds display and error inject
capability
Data Inversion
Menu selectable
1s Density Protection
Force 1s to network after one second of consecutive
zeros from DTE. On/Off.
CTS, DCD, DSR Options
Normal or Forced ON
Connector
Winchester (V.35), female
Inband Communication Channel
Enabled, Disabled, or On-Demand
42nd GEN Nx56/64 Option Module User Manual61202.054L1-1
Physical Description
The 2nd GEN Nx56/64 V.35 option module plugs into
the option slot in the rear of the TSU/HSU family of
products (see Figure 1-1).
The rear panel of the option module includes a plastic
plug over a cutout for a second V.35 connector. This
allows a 2nd GEN Nx56/64 V.35 plug-on board (or any
other plug-on board) to be added to the 2nd GEN
Nx56/64 option module creating a multiport module.
The PORT X.1 and X.2 indication is linked to the port
numbering philosophy of the TSU/HSU product family.
The X represents the slot number, into which the option
module is plugged. For the TSU 100 there is only one
option slot. Therefore the port designation would be 1.1
and, if a plug-on V.35 is present, port 1.2. In a TSU 600
with six option slots, these port numbers would be port
1.1 to port 6.1. The numbers appear in the front panel
LCD menu displays.
Chapter 1. Introduction
3
2
NX 56/64
PORT X.1
HOT
REPLACEABLE
V.35
1 - Cutout for second V.35 connector
2 - Screw receptacles for plug-on board
3 - Port X.2 header pins
NX 56/64
PORT X.2
V.35
1
Figure 1-1
2nd GEN Nx56/64 V.35 Option Module
61202.054L1-12nd GEN Nx56/64 Option Module User Manual5
2
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