Control Port Operation; Figure 5. Rs-232 (Db-9) Pin Assignments; Table 5. Hdsl2 Loopback Options; Table 6. Screen Abbreviations Defined - ADTRAN DDM+ H2TU-C Installation And Maintenance Manual

Table 5. HDSL2 Loopback Options

Faceplate Display Message
Loopback
Mode Select State
LPBK ... HTUC .... NET ....... Network loopback at the H2TU-C
CST ........ Customer loopback at the H2TU-C
NONE .... No active loopback
HTUR .... BLB ....... Bilateral loopback at the H2TU-R
NET ....... Network loopback at the H2TU-R
CST ........ Customer loopback at the H2TU-R
NONE .... No active loopback

6. CONTROL PORT OPERATION

The H2TU-C provides a faceplate-mounted DB-9
connector that supplies an RS-232 interface for
connection to a controlling terminal. The pinout of
the DB-9 is illustrated in Figure 5.
1
6
TXD (Transmit Data)
2
7
RXD (Receive Data)
3
8
4
9
SGN (Signal Ground)
5

Figure 5. RS-232 (DB-9) Pin Assignments

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 line
wrap feature of emulation programs should also be
displayed.
The H2TU-C supports two types of terminal
emulation modes. The Manual Update Mode is a
dumb terminal mode, where the user can use print
screen and log files commands easily. This mode also
includes a "3 SPACES TO UPDATE" message on the
top of the terminal screen (press the space bar 3 times
to update the screen).
The Real Time Update Mode is a VT100 terminal
mode. This mode enables all screen highlighting and
cursor placement. Print screen and log file commands
are not available in this mode.
The default terminal mode is Real Time Update.
61222003L1-5A
Description
61222003L1-5, Issue 1
NOTE
If you are using a personal computer (PC) with
terminal emulation capability, be sure to disable
any power saving programs. Otherwise,
communication between the PC and the HDSL2
unit may be disrupted, resulting in misplaced
characters or screen time outs.
Operation
For abbreviations used in the screen diagrams, see
Table 6. The Performance Data Definitions Screen
also offers a listing of screen definitions by selecting
"1" from the screen definitions.
Table 6. Screen Abbreviations
Abbreviation Definition
NET ............................. Network (DSX-1)
CUST ........................... Customer (DS1)
ATTEN ........................ Pulse Attenuation
LOS ............................. Loss of Signal
SF ................................. Superframe format
ESF .............................. Extended Superframe format
B8ZS ............................ Bipolar with 8 Zero Substitution
AMI ............................. Alternate Mark Inversion
LBO ............................. Line Build Out
BPV ............................. Bipolar Violation
NIU .............................. T1 Network Interface Unit
S/N ............................... Serial Number
15M ............................. Fifteen-Minute period
60M ............................. Sixty-Minute period
24H .............................. Twenty-Four-Hour period
The screens illustrated in Figure 6 through Figure 23
apply to an HDSL2 circuit deployed with ADTRAN's
HDSL2 technology. The circuit includes an H2TU-C
and an H2TU-R. Other configurations are possible
(i.e., other vendor's equipment) and their displays will
vary slightly from those shown in this section.
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