ADTRAN DS3 NIU3 PM, Установка и эксплуатация

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8 Issue 5, February 2011 61213075L2-5E
Control Port Operation
The NIU3 PM front panel DB-9 provides an RS-232
craft interface for connection to a controlling terminal.
The DB-9 pinout is shown in
Figure 6 . A terminal
session is initiated upon insertion of a DB-9 jack into
the RS-232 craft interface. The terminal interface
operates at data rates from 1.2 kbps to 19.2 kbps. The
asynchronous data format is fixed at 8 data bits, no
parity, and 1 stop bit. The supported terminal type is
VT100 or compatible.
Figure 6. Front Panel DB-9 Pin Assignments
Terminal Session
The NIU3 PM synchronizes upon insertion in a
powered-up shelf or housing. After synchronization,
terminal sessions provide access to screen menus for
provisioning, monitoring, testing, or obtaining perfor-
mance or event history. Terminal session screen access
is available at any time during operation. The screens
shown in this practice identify the main menu screens;
subordinate screens are not depicted. Abbreviations
used in screen diagrams are explained in
Table 4 on
page 8.
NOTE
If using a personal computer with terminal
emulation capability, disable all power saving
programs. Otherwise, communication between
the PC and the NIU3 PM may be disrupted,
resulting in misplaced characters, or screen
time outs.
NOTE
Not all option screens are shown in this
document. Many screen options selected will
advance to additional screens with additional
options. Navigation through the complete
option menu series is enhanced with on-screen
instructions.
6
7
8
9
1
2
3
4
5
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)
Table 4. Definition of Screen Abbreviations
Abbreviation Definition
2ˆ23-1 Pseudorandom Pattern : This format designates the pattern used to simulate live T3 data.
AIS Alarm Indication Signal : An alarm indication signal is a framed, alternating 1s and 0s (1010...) signal
sent down or up stream by a device when it detects an error condition or receives an error notification
from another unit in the transmission path.
AISS-P AIS Seconds-Path : This condition is defined as a count of 1-second intervals containing one or more
AIS defects.
BPV Bipolar Violation : This violation represents the occurrence of a pulse of the same polarity as the
previous pulse. BPVs that are part of the zero substitution code are excluded.
C-Bit DS3 C-Bit Parity : This format is defined as a framed DS3 signal with an application identification
channel signal set to 1. The C-Bit channel is available for carrying parity information, FEBE bits, far-
end alarm and control signals, etc.
CV-L Code Violation Count : This count represents the number of BPVs and EXZs occurring over the
accumulation period.