ADTRAN 850 specifications Maintenance, Specifications, Warranty and Customer Service

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TEST7

8

9

1 +5 V

2 GND

3 64 kHz

4 8 kHz

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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.

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		1 11/16” W x 3” H x 10” L
Weight		1 lb
Environmental
Operating Temperature		-40 to 65 oC
Storage Temperature		-40 to 85 oC
Relative Humidity		Up to 95%, noncondensing
Configuration Codes
Power Code (PC)		IN: F, OUT: C
Telecommunication Code		IN: X, OUT: X
(TC)
Installation Code (IC)		IN: A, OUT: -

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

19.2K, 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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