Specifications; Maintenance; Warranty And Customer Service; Figure 3. Db-9 Connector Pinout - ADTRAN 850 Installation And Operation Manual

TEST

Figure 3. DB-9 Connector Pinout

DS0 test equipment is used to test DS0 access modules
such as the OCU DP, DS0 DP, or U-BR1TE. Once the test
equipment is connected to the reference clock source,
individual tests can be performed on DS0 access mod-
ules using the faceplate bantam jacks on each unit.
T1 Loopbacks
The TA 850 supports several T1 loopbacks via the craft
interface. These loopbacks include:
• Initiating a remote payload or line loopback com-
mand (ESF mode only).
• Responding to a remote payload or line loopback
command (ESF mode only).
• Responding to a remote CSU loopback command.
Figure 2 on page 3 displays where the various loop-
backs occur in the TA 850 BCU circuitry.
Self Test
The BCU goes into self test when inserted into an active
TA 850 chassis. The self test checks internal BCU circuit-
ry. A failed test causes the faceplate Network T1 LED to
blink red.

5. SPECIFICATIONS

Refer to Table 4 for TA 850 BCU specifications.

Table 4. Specifications

Mechanical
Dimensions
Weight
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
Configuration Codes
Power Code (PC)
Telecommunication Code
(TC)
Installation Code (IC)
61200373L1-5B
1
+5 V
6
2 GND
7
3 64 kHz
8
8 kHz
4
9
5
1 11/16" W x 3" H x 10" L
1 lb
o
-40 to 65 C
o
-40 to 85 C
Up to 95%, noncondensing
IN: F, OUT: C
IN: X, OUT: X
IN: A, OUT: -
Issue 2, August 2001

6. MAINTENANCE

The TA 850 BCU does not require routine maintenance
for design operation.
ADTRAN does not recommend that repairs be attempt-
ed in the field. Repair services are obtained by returning
the defective unit to ADTRAN Customer Service de-
partment.
Flash Upload
The TA 850 BCU can flash upload firmware to the unit
using the front panel VT 100 craft interface. Flash up-
load is useful for product upgrade or enhancements.
Flash upload procedures are as follows:
1. Obtain firmware, available by diskette or email, from
ADTRAN Customer Service.
2. Connect to the craft interface port using instructions
found in "OPTIONS" on page 2.
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 850 BCU uses the XMODEM pro-
tocol to transfer code.
6. After successfully uploading code, the TA 850 Bank
Controller will reset itself and resume operation.

7. WARRANTY AND CUSTOMER SERVICE

ADTRAN will replace or repair this product within 10
years from the date of shipment if it does not meet its
published specifications or fails while in service. For de-
tailed warranty, repair, and return information refer to
the ADTRAN Equipment Warranty and Repair and Re-
turn Policy Procedure.
Return Material Authorization (RMA) is required prior
to returning equipment to ADTRAN.
For service, RMA requests, or more information, see the
following sections for the correct toll-free contact num-
ber.
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