Section 311-610-20B
030-101522 Rev. C
21
0509IBRC
be put in loopback. The TL1 instruction sequence is outlined in
Appendix C of this document.
9.3.1
Remote Provisioning via 16-Bit Commands
To initiate a remote provisioning session, the NIU is first put into
loopback. While in loopback, the test person sends the appropri-
ate provisioning code to the NIU. Each code consists of a 16-bit
pattern and can be unframed, SF or ESF framed. All codes must
be sent to the unit for minimum of five seconds. In order to see
a bit-error response from the unit, the code must be present for
a minimum of 20 seconds. The unit will respond to the code with
bit errors after the 20-second time frame. Provisioning codes
and responses shown in Appendix A.
9.3.2
Remote Query of Provisioned Parameters via 16-Bit
Commands
The NIU also allows the test person to query the NIU and deter-
mine its provisioned options. To initiate a remote query session,
the NIU is first put into loopback. Once in loopback, the test per-
son sends the appropriate 16-bit query code to the NIU. All
query codes must be sent to the unit for minimum of five sec-
onds. In order to see a bit-error response from the unit, the
query code must be present for a minimum of 20 seconds. Query
codes and responses are shown in Appendix B.
9.4
Power
9.4.1
Local Power Input Lead Fusing
The NIU offers a flexible powering option which will allow the
unit to operate directly from T1 metallic spans, or from a locally-
provided 22 to 56Vdc source. The NIU is fused on its local power
input lead, pin 35, to prevent the failure of an individual NIU
from affecting other units on the same local power supply. This
fuse is not field replaceable since failure is an indication of an in-
ternal fault of the unit.
- NOTE -
The 3116-10 is equipped with an on-board 3V Lithium battery. If power
is removed from the circuit for whatever reason, the battery circuit is en-
abled to maintain the real-time clock circuit. If the battery ever needs re-
placement, the unit must be returned to Westell.
9.4.2
PCB Powering Option Switch
The unit contains an option to configure the unit for either span
or local powering. The option must be set at the time of installa-
tion. Figure 12 shows the location of this option. Select either
SPAN or LOCAL, as required by the application.
10.
TESTING & TROUBLESHOOTING
10.1
Testing and Field Repairs
This equipment should not be field repaired. If the equipment
is suspected of being faulty, replace it with another unit, op-
tioned identically, and retest. If the replacement unit appears to
operate correctly, the original unit may be faulty and should be
returned to Westell for repair or replacement (Paragraph 12.2).
10.2
Troubleshooting
If trouble is encountered, verify all installer connections to the
assembly and check that the CO power fuse is not blown. Also
verify all module connections and option switch settings, and
verify the modules are making a positive connection with the
shelf connector. If trouble persists, replace the suspect unit and
repeat procedures outlined. These procedures are not designed
to effect repairs or modifications. Any tests beyond those out-
lined herein, or repairs made beyond replacing a faulty unit, are
not recommended and may void the warranty.
11.
CUSTOMER & TECHNICAL SERVICES
11.1
Customer Service & Technical Assistance
If technical or customer assistance is required, contact Westell
by calling or using one of the following options:
Voice: (630) 898-2500
Voice: (800) 323-6883
email:
Visit the Westell World Wide Web site at http://
www.Westell.com
for additional information about Westell.
11.2
Part Numbers
This equipment is identified by a product number (B90-
311610), which consists of three parts: the issue letter of the
equipment (B), the assembly type (90), and the specific model
number (311610). When a change is made to the product which
changes the form, fit, or function of the product, the issue letter
is incremented by one. Please indicate the issue level as well as
the model number when making equipment inquiries.
12.
WARRANTY & REPAIRS
12.1
Warranty
Westell warrants this product to be free of defects at the time of
shipment. Westell also warrants this product to be fully func-
tional for the time period specified by the terms and conditions
governing the sale of the product. Any attempt to repair or
modify the equipment by anyone other than an authorized Wes-
tell representative will void the warranty.
12.2
Repair and Return
Westell will repair or replace any defective Westell equipment
without cost during the warranty period if the unit is defective
for any reason other than abuse, improper use, or improper
installation. Before returning the defective equipment, first re-
quest a Return Material Authorization (RMA) number from
Westell. Once an RMA number is obtained, return the defective
unit, freight prepaid, along with a brief problem description, to:
Westell, Inc.
ATTN: R.G.M. Department
750 N. Commons Drive
Aurora, IL 60504-7940
Replacements will be shipped in the fastest manner consistent
with the urgency of the situation. Westell will continue to repair
