Product specifications

61181113L2-5A Issue 1, November 2003 7

In addition to network side loopbacks, the H2TU-C

provides customer side loopbacks initiated by using

either the terminal control port or in-band loop codes.

(See Appendix A.) In this mode, an AIS signal is trans-

mitted to the network.

6. SCU CONTROL PORT OPERATION-HDSL2

The Total Access 3000 provides a front panel-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 7.

Figure 7. RS-232 (DB-9) Pin Assignments

The terminal interface operates at a data rate of 9.6

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 be disabled.

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 three times to

update the screen.)

The Real Time Update Mode is a VT100 terminal mode

and is the default update mode. This mode enables all

screen highlighting and cursor placement. Print screen

and log file commands are not available in this mode.

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.

TXD (Transmit Data

)

RXD (Receive Data

)

SGN (Signal Groun