Table of Contents
Advertisement
T1
T1
RX
R1
PAIR
MON IN
Test Jack
T
T1
Equalizer
TX
PAIR
R
MON OUT
Test Jack
TEST
Figure 4. DB-9 Connector Pinout
5. SPECIFICATIONS
Refer to Table 6 for TA 750 BCU specifications.
6. MAINTENANCE
The TA 750 BCU does not require routine
maintenance for design operation.
ADTRAN does not recommend that repairs be
attempted in the field. Repair services are obtained by
returning the defective unit to ADTRAN Customer
Service department.
Flash Upload
The TA 750 BCU provides the ability to flash upload
Firmware to the unit using the front panel VT 100
craft interface. Flash upload is useful for product
6
Receiver Circuitry
Clock and Data
Recovery
DJAT
Transmitter Circuitry
Local
Loopback
Point
Figure 3. Bantam Jack Monitoring Points
1
+5 V
6
2
GND
7
64 kHz
3
8
8 kHz
4
9
5
Section 61175012L2-5, Issue 4
Line Format
Decoder
Line Format
Encoder
Line
Loopback
Point
upgrade or enhancements. Flash upload procedures
are as follows:
1. Obtain Firmware from ADTRAN Customer
Service (see section 7). The Firmware is
available by diskette or email.
2. Connect to the craft interface port using
instructions found in section 3, OPTIONS.
3. Once connected, enter the Bank Controller
Submenu and select "Upload Code".
4. To upload code, select "Load new code" and
follow the instructions on the screen. The user
is offered the opportunity to increase the baud
rate from 9600 to 19.2 K, 38.4 K, or 57.6 K. Be
sure that your terminal device can support a
higher speed before selecting. Also, some
terminal emulation packages (such as
Hyperterminal) require that the current session
be disconnected and reconnected after changing
from one baud rate to another.
5. Continue to follow the instructions on the
screen, noting that the TA 750 BCU uses the
XMODEM protocol to transfer code.
6. After successfully uploading code, the TA 750
Bank Controller will reset itself and resume
operation.
To
Backplane
From
Backplane
Payload/CSU
Loopback
Point
61175012L2-5D
Advertisement
Table of Contents
