Unit installation

6 Issue 1, November 2003 61223026L2-5A
NOTE
Network and customer loopbacks are governed
by the loopback time out option (defaulted to
120 minutes).
Figure 3. HDSL2 Loopbacks
Control Port Terminal Access
The H2TU-R 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 4
Figure 4. 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
supported terminal type is dumb terminal, VT100 or
compatible. The line wrap feature of emulation
programs should also be disabled.
NOTE
If you are using a personal computer 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
timeouts.
A terminal session is initiated by entering multiple
spacebar characters, which are used by the H2TU-R to
determine the speed of the terminal. Once the speed has
been determined, an HDSL2 Main Menu is presented,
which will be detailed in the Control Port Operation-
HDSL2 section.
5. PROVISIONING
Through management access via the front panel DB-9
connector, the provisioning settings can be viewed and
manipulated, as detailed in the Control Port Operation-
HDSL2 section.
Tab le 7 lists the available provisioning options and the
factory default settings.
DSX-1
H2TU-C
LOCAL
LOOP
H2TU-C Network-Side Loopback
H2TU-R
H2TU-C
LOCAL
LOOP
H2TU-R Customer-Side Loopback
H2TU-R
H2TU-C
LOCAL
LOOP
HT2U-C Customer-Side Loopback
H2TU-R
X
X
DS1
DSX-1
H2TU-C
LOCAL
LOOP
H2TU-R Network-Side Loopback or
H2TU-R Smartjack Loopback
H2TU-R
X
DS1
DS1
DS1
X
AIS
AIS
AIS
AIS
X = Signal Inactive
D = Data Sent
H2TU-C
LOCAL
LOOP
H2TU-R Bilateral Loopback
DS1DSX-1
H2TU-R
6
7
8
9
1
2
3
4
5
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)