Control Port Operation (Hdsl4); Figure 4. Hdsl4 Loopbacks; Figure 5. Rs-232 (Db-9) Pin Assignments - ADTRAN H4TUC 3192 Installation And Maintenance Practice

The loopback condition imposed in all cases is a logic
level loopback at the point within the H4TU-C where
the DSX-1 signal passes into the HDSL4 modulators.
Figure 4 depicts all of the loopback locations possible
with ADTRAN HDSL4 equipment.
H4TU-C Network-Side Loopback
LOCAL
DSX-1
H4TU-C
H4TU-R Network-Side Loopback and/or
H4TU-R NIU Loopback
LOCAL
DSX-1
H4TU-C
H4TU-R Customer-Side Loopback
X
LOCAL
DSX-1
AIS
H4TU-C
H4TU-C Customer-Side Loopback
X
LOCAL
DSX-1
AIS H4TU-C
H4R Network-Side Loopback
DSX-1
H4TU-C
H4R Customer-Side Loopback
X
DSX-1
AIS H4TU-C
H4R1 Network-Side Loopback
DSX-1
H4TU-C H4R1
H4R1 Customer-Side Loopback
X
DSX-1
H4TU-C H4R1
AIS
H4R2 Network-Side Loopback
DSX-1
H4TU-C H4R1
H4R2 Customer-Side Loopback
X
DSX-1
H4TU-C H4R1
AIS
X = Signal Inactive

Figure 4. HDSL4 Loopbacks

In addition to network-side loopbacks, the H4TU-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
supplied to the network.
6
AIS
DS1
LOOP
X
H4TU-R
AIS
DS1
LOOP
X
H4TU-R
DS1
LOOP
H4TU-R
DS1
LOOP
H4TU-R
AIS
DS1
X
H4R H4TU-R
DS1
H4R H4TU-R
AIS
DS1
X
H4R2 H4TU-R
DS1
H4R2 H4TU-R
AIS
DS1
X
H4R2 H4TU-R
DS1
H4R2 H4TU-R

5. CONTROL PORT OPERATION (HDSL4)

The 3192 H4TU-C 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 5.
1
6
2
7
3
8
4
9
5

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

The terminal interface can operate at data rates of 1.2,
2.4, 4.8, 9.6, and 19.2 kbps. The asynchronous data
format is fixed at eight data bits, no parity, and one
stop bit. The supported terminal type is VT100 or
compatible.
The H4TU-C supports two types of terminal
emulation modes. The Manual Update mode is a
dumb terminal mode, where the print screen and log
file commands can be used easily. This mode also
includes a "3 SPACES TO UPDATE" message on the
top of the terminal screen. (Press the spacebar three
times to update the screen.)
The Real Time Update 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 mode.
NOTE
Pressing the C T
TRL
toggle between Manual and Real Time terminal
modes.
NOTE
Pressing while on any screen will go back to
E
SC
the previous screen.
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)
while on any screen will
61222404L1-5B