Control Port Operation; Figure 5. Rs-232 (Db-9) Connector - ADTRAN HTU-C NB Installation And Maintenance Practice

CONTROL PORT OPERATION

The HTU-C NB/WB for Litespan provides a front panel-mounted female 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
or jumpers are not provided.
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.
Many portable personal computers use power-saving programs
that are known to interfere with applications running on the
personal computer. If using a portable personal computer with
terminal emulation capability, communication between the
computer and the HDSL unit may be periodically disrupted if
power saving programs are being used on the personal computer.
The symptoms may include misplaced characters appearing on the
screen or the occurrence of screen time outs. These symptoms are
not disruptive to the operation of the circuit and are avoidable if
the power saving options are disabled or removed.
61247002L1-5A
5. The line card must be provisioned through the control port. Switches

Figure 5. RS-232 (DB-9) Connector

Pin 5 - Signal Ground (SGN)
Pin 3 - Receive Data (RXD)
Pin 2 - Transmit Data (TXD)
NOTE
Control Port Operation
11