Advertisement
Example: if an input TLP of 3 dB is to produce a level
of 0 dBm0 at TLP 0, then the Transmit Attenuation
should be set to 3.0 dB.
RECEIVE ATTENUATION
Determine the output TLP. Then use the following
formula to calculate the amount of receive attenuation
to add to the circuit:
Rx Attenuation = Output TLP
Example: if 0 dBm0 at TLP 0 is required to produce
an output TLP level of -3 dB, then the Receive
Attenuation should be set to 3 dB.
Electronic Provisioning
The craft interfaces on the TA 750 BCU, TA 850
RCU, or the TA 1500 SCU are used to change default
options and obtain access module status through menu
screens. To access the menu screens, connect a
VT 100 terminal or computer running a terminal
emulation program to the faceplate craft interface
ADMIN port using a standard male-to-female RS-232
DB-9 cable. Craft port settings are as follows:
•
9600 Baud
•
No parity
•
8 Data bits
•
1 Stop bit
WINDOWS HYPERTERMINAL
Windows Hyperterminal can be used as a VT 100
terminal emulation program. Open Hyperterminal by
selecting PROGRAMS / ACCESSORIES /
HYPERTERMINAL. Refer to the Help section of
Hyperterminal for additional information.
NOTE
To ensure proper display background, select
VT 100 terminal emulation under SETTINGS.
PASSWORD
Upon initial connection, the password option is factory
disabled. To enable the password, select Bank
Controller (1)/ Password Control (8)/ Enable Password
(2). The factory default is PASSWORD in all capital
letters. The password can be changed to a user-
selected password if desired.
MENU NAVIGATION
To traverse through the menus, select the desired entry
and press ENTER. To work backwards in the menu
press the ESC (escape) key.
61175407L1-5B
4. OPERATION
The Quad FXO initializes and goes operational upon
insertion into an active TA 750/850/1500 chassis.
Initialization with the network is indicated by the
faceplate LEDs.
LED Status
Status of the analog service for each customer loop is
shown by four (green) faceplate LEDs. Indication is
as follows:
Off
Flashing
On
Sequencing
If the unit is inserted into a bank which has its
time slots allocated to the module assigned to
the DSX-1 or Nx56/64 port, the LEDs will
sequence, indicating a problem. The time
slots must be freed up before the unit will
become operational.
Time Slot Assignment
The TA 750/850/1500 platforms can have multiple
time slots in the T1 data stream assigned to each
physical slot in the channel bank. Table 1 outlines the
correlation between the T1 and physical slot for the
TA 750. The TA 1500 allows craft selectable time
slots using the electronic provisioning interface.
Table 1. TA 750 Time Slot Assignments
P
h
y
s
Section 61175407L1-5, Issue 2
-
On Hook
-
Ringing
-
Off Hook (Busy)
-
Time Slot Unavailable
NOTE
c i
l a
l S
t o
T
1
i T
m
1
2
3
4
5
6
e
l S
t o
A
s
s
g i
n
e
d
1
-
4
5
-
8
9
-
2 1
3 1
-
6 1
7 1
-
0 2
1 2
-
4 2
3
Advertisement
