Viking GLS-12 Instructions for use

Model GLS-12 is designed to allow up to
12 standard telephone sets, multi-line
key systems or other loop start equip-
ment to be connected to and operate on
two-wire ground start CO trunk lines.
The GLS-12 provides the CO ground
start line with the signalling required to
draw dial tone when the loop start equip-
ment goes off-hook. Incoming calls are
not affected by the GLS-12 and ring
directly to the loop start devices.
Use Loop Start Devices on
Ground Start Trunks
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TE EL LE EC CO OM MS SO OL LU UT TI IO ON NS SF FO OR RT TH HE E2 21 1S ST TC CE EN NT TU UR RY Y
TECHNICAL
TECHNICAL
GLS-12
GLS-12
12 Circuit Ground to
Loop Start Converter
March 19, 2012
• 12 circuit automatic ground start to loop start
equipment converter
• Stackable to increase capacity
• Easy, straight forward installation via an
RJ-21X 25 pair connector
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• Allows PABX and key systems configured
for loop start trunks, as well as standard
telephones to be connected to C.O. ground
start trunks
• Eliminates wiring ground start buttons in
standard telephones
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Ap pp pl li ic ca at ti io on ns s
Power: The unit is powered by the 48V ground start C.O.
trunk lines - no AC power supply required
Dimensions: 133mm x 89mm x 44mm (5.25” x 3.5” x
1.75”)
Shipping Weight: 1.13 kg (2.5 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to
95% non-condensing humidity
Connections: (1) RJ-21X female, 25 pair

IF YOU HAVE A PROBLEM WITH A VIKING PRODUCT, PLEASE CONTACT: VIKING TECHNICAL SUPPORT AT [phone]
Our Technical Support Department is available for assistance Monday 8am - 4pm and Tuesday through Friday 8am - 5pm central time. So that we can give you better service, before you call please:
1. Know the model number, the serial number and what software version you have (see serial label).
2. Have your Technical Practice in front of you.
3. It is best if you are on site.
RETURNING PRODUCT FOR EXCHANGE
The following procedure is for equipment that has failed out-of-box (within 10 days of purchase):
1. Customer must contact Viking’s Technical Support at 715-386-8666 to determine possible causes for the problem. The
customer MUST be able to step through recommended tests for diagnosis.
2. If the Technical Support Product Specialist determines that the equipment is defective based on the customer's input
and troubleshooting, a Return Authorization (R.A.) number will be issued. This number is valid for fourteen (14)
calendar days from the date of issue.
3. After obtaining the R.A. number, return the approved equipment to your distributor, referencing the R.A. number. Your
distributor will then replace the product over the counter at no charge. The distributor will then return the product to
Viking using the same R.A. number.
4. The distributor will NOT exchange this product without first obtaining the R.A. number from you. If you haven't
followed the steps listed in 1, 2 and 3, be aware that you will have to pay a restocking charge.
RETURNING PRODUCT FOR REPAIR
The following procedure is for equipment that needs repair:
1. Customer must contact Viking's Technical Support Department at 715-386-8666 to obtain a Return Authorization (RA)
number. The customer MUST have a complete description of the problem, with all pertinent information regarding the
defect, such as options set, conditions, symptoms, methods to duplicate problem, frequency of failure, etc.
2. Packing: Return equipment in original box or in proper packing so that damage will not occur while in transit. Static
sensitive equipment such as a circuit board should be in an anti-static bag, sandwiched between foam and individual-
ly boxed. All equipment should be wrapped to avoid packing material lodging in or sticking to the equipment. Include
ALL parts of the equipment. C.O.D. or freight collect shipments cannot be accepted. Ship cartons prepaid to:
Viking Electronics, 1531 Industrial Street, Hudson, WI 54016
3. Return shipping address: Be sure to include your return shipping address inside the box. We cannot ship to a PO Box.
4. RA number on carton: In large printing, write the R.A. number on the outside of each carton being returned.
the necessary modifications to maintain uninterrupted service.
If trouble is experienced with the GLS-12, for repair or warranty information, please contact:
Viking Electronics, Inc., 1531 Industrial Street, Hudson, WI 54016 [phone]
If the equipment is causing harm to the telephone network, the telephone company may request that you disconnect the
equipment until the problem is resolved.
Connection to Party Line Service is subject to State Tariffs. Contact the state public utility commission, public service com-
mission or corporation commission for information.
WHEN PROGRAMMING EMERGENCY NUMBERS AND (OR) MAKING TEST CALLS TO EMERGENCY NUMBERS:
Remain on the line and briefly explain to the dispatcher the reason for the call. Perform such activities in the off-peak
hours, such as early morning or late evenings.
It is recommended that the customer install an AC surge arrester in the AC outlet to which this device is connected. This
is to avoid damaging the equipment caused by local lightning strikes and other electrical surges.
PART 15 LIMITATIONS
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communica-
tions. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
FCC REQUIREMENTS
This equipment complies with Part 68 of the FCC rules and the requirements adopted by the ACTA. Located on the equip-
ment is a label that contains, among other information, a product identifier in the format US:AAAEQ##TXXXX. If request-
ed, this number must be provided to the telephone company.
The REN is used to determine the number of devices that may be connected to a telephone line. Excessive REN's on a
telephone line may result in the devices not ringing in response to an incoming call. In most but not all areas, the sum of
the REN's should not exceed five (5.0) To be certain of the number of devices that may be connected to a line, as deter-
mined by the total REN's, contact the local telephone company. For products approved after July 23, 2001, the REN for
this product is part of the product identifier that has the format US:AAAEQ##TXXXX. The digits represented by ## are the
REN without a decimal point (e.g., 03 is a REN of 0.3). For earlier products, the REN is separately shown on the label.
The plug used to connect this equipment to the premises wiring and telephone network must comply with the applicable
FCC Part 68 rules and requirements adopted by the ACTA. If your home has specially wired alarm equipment connected
to the telephone line, ensure the installation of this GLS-12 does not disable your alarm equipment. If you have questions
about what will disable alarm equipment, consult your telephone company or a qualified installer.
If the GLS-12 causes harm to the telephone network, the telephone company will notify you in advance that temporary
discontinuance of service may be required. But if advance notice isn't practical, the telephone company will notify the cus-
tomer as soon as possible. Also, you will be advised of your right to file a complaint with the FCC if you believe it is nec-
essary.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the
operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make
W
Wa ar rr ra an nt ty y
NOTICE
This equipment meets the applicable Industry Canada Terminal Equipment Technical Specifications. This is confirmed by the registration number. The abbreviation, IC, before the regis-
tration number signifies that registration was performed based on a Declaration of Conformity indicating that Industry Canada technical specifications were met. It does not imply that
Industry Canada approved the equipment.
NOTICE
The Ringer Equivalence Number (REN) for this terminal equipment is 0.1. The REN assigned to each terminal equipment provides an indication of the maximum number of terminals
allowed to be connected to a telephone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the Ringer
Equivalence Numbers of all the devices does not exceed five.
AVIS
Le présent matériel est conforme aux spécifications techniques d’Industrie Canada applicables au matériel terminal. Cette conformité est confirmée par le numéro d'enregistrement. Le
sigle IC, placé devant le numéro d'enregistrement, signifie que l’enregistrement s’est effectué conformément à une déclaration de conformité et indique que les spécifications techniques
d'Industrie Canada ont été respectées. Il n’implique pas qu’Industrie Canada a approuvé le matériel.
AVIS
L'indice d'équivalence de la sonnerie (IES) du présent matériel est de 0.1. L'IES assigné à chaque dispositif terminal indique le nombre maximal de terminaux qui peuvent être raccordés
à une interface téléphonique. La terminaison d'une interface peut consister en une combinaison quelconque de dispositifs, à la seule condition que la somme d'indices d'équivalence de
la sonnerie de tous les dispositifs n'excède pas 5.
2
LIMITED WARRANTY
Viking warrants its products to be free from defects in the workmanship or materials, under normal use and service, for a period of one year from the date of purchase from any authorized Viking distributor or 18 months from the date manu-
factured, which ever is greater. If at any time during the warranty period, the product is deemed defective or malfunctions, return the product to Viking Electronics, Inc., 1531 Industrial Street, Hudson, WI., 54016. Customer must contact Viking's
Technical Support Department at 715-386-8666 to obtain a Return Authorization (R.A.) number.
This warranty does not cover any damage to the product due to lightning, over voltage, under voltage, accident, misuse, abuse, negligence or any damage caused by use of the product by the purchaser or others. This warranty does not cover
non-EWP products that have been exposed to wet or corrosive environments.
NO OTHER WARRANTIES. VIKING MAKES NO WARRANTIES RELATING TO ITS PRODUCTS OTHER THAN AS DESCRIBED ABOVE AND DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTIES OR MERCHANTABILITY OR FIT-
NESS FOR ANY PARTICULAR PURPOSE.
EXCLUSION OF CONSEQUENTIAL DAMAGES. VIKING SHALL NOT, UNDER ANY CIRCUMSTANCES, BE LIABLE TO PURCHASER, OR ANY OTHER PARTY, FOR CONSEQUENTIAL, INCIDENTAL, SPECIAL OR EXEMPLARY DAM-
AGES ARISING OUT OF OR RELATED TO THE SALE OR USE OF THE PRODUCT SOLD HEREUNDER.
EXCLUSIVE REMEDY AND LIMITATION OF LIABILITY. WHETHER IN AN ACTION BASED ON CONTRACT, TORT (INCLUDING NEGLIGENCE OR STRICT LIABILITY) OR ANY OTHER LEGAL THEORY, ANY LIABILITY OF VIKING SHALL
BE LIMITED TO REPAIR OR REPLACEMENT OF THE PRODUCT, OR AT VIKING'S OPTION, REFUND OF THE PURCHASE PRICE AS THE EXCLUSIVE REMEDY AND ANY LIABILITY OF VIKING SHALL BE SO LIMITED.
IT IS EXPRESSLY UNDERSTOOD AND AGREED THAT EACH AND EVERY PROVISION OF THIS AGREEMENT WHICH PROVIDES FOR DISCLAIMER OF WARRANTIES, EXCLUSION OF CONSEQUENTIAL DAMAGES, AND EXCLU-
SIVE REMEDY AND LIMITATION OF LIABILITY, ARE SEVERABLE FROM ANY OTHER PROVISION AND EACH PROVISION IS A SEPARABLE AND INDEPENDENT ELEMENT OF RISK ALLOCATION AND IS INTENDED TO BE ENFORCED
AS SUCH.

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In ns st ta al ll la at ti io on n
Note: The GLS-12 is polarity sensitive.
IMPORTANT: Electronic devices are susceptible to lightning
surges from the telephone line. It is recommended that a
surge protector be installed to protect against such surges.
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or subsidiaries assume no respon-
sibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate such changes.
DOD# 570 ZF303090 Rev APrinted in the U.S.A.
Circuit
Circuit 1
Circuit 2
Circuit 3
Circuit 4
Circuit 5
Circuit 6
Trunk/Station
Trunk 1
Station 1
Trunk 2
Station 2
Trunk 3
Station 3
Trunk 4
Station 4
Trunk 5
Station 5
Trunk 6
Station 6
Line
T1T (+)
T1R (-)
S1T
S1R
T2T (+)
T2R (-)
S2T
S2R
T3T (+)
T3R (-)
S3T
S3R
T4T (+)
T4R (-)
S4T
S4R
T5T (+)
T5R (-)
S5T
S5R
T6T (+)
T6R (-)
S6T
S6R
Pins
26
1
27
2
28
3
29
4
30
5
31
6
32
7
33
8
34
9
35
10
36
11
37
12
Color
W/BL
BL/W
W/O
O/W
W/G
G/W
W/BN
BN/W
W/S
S/W
R/BL
BL/R
R/O
O/R
R/G
G/R
R/BN
BN/R
R/S
S/R
BK/BL
BL/BK
BK/O
O/BK
(Trunk Inputs are
Polarity Sensitive)
Circuit
Circuit 7
Circuit 8
Circuit 9
Circuit 10
Circuit 11
Circuit 12
Trunk/Station
Trunk 7
Station 7
Trunk 8
Station 8
Trunk 9
Station 9
Trunk 10
Station 10
Trunk 11
Station 11
Trunk 12
Station 12
Line
T7T (+)
T7R (-)
S7T
S7R
T8T (+)
T8R (-)
S8T
S8R
T9T (+)
T9R (-)
S9T
S9R
T10T (+)
T10R (-)
S10T
S10R
T11T (+)
T11R (-)
S11T
S11R
T12T (+)
T12R (-)
S12T
S12R
GND
GND
Pins
38
13
39
14
40
15
41
16
42
17
43
18
44
19
45
20
46
21
47
22
48
23
49
24
50
25
Color
BK/G
G/BK
BK/BN
BN/BK
BK/S
S/BK
Y/BL
BL/Y
Y/O
O/Y
Y/GN
GN/Y
Y/BN
BN/Y
Y/S
S/Y
V/BL
BL/V
V/O
O/V
V/GN
GN/V
V/BN
BN/V
V/S
S/V
(Trunk Inputs are
Polarity Sensitive)
MODEL GLS-12
VIKING
ELECTRONICS
HUDSON, WI 54016
LINE 1 LINE 2 LINE 3 LINE 4 LINE 5 LINE 6 LINE 7 LINE 8 LINE 9 LINE 10 LINE 11 LINE 12
VIKING©
12 LINE GROUND TO LOOP
START CONVERTER
!
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Troubleshooting:
1. The ground start trunk must be connected to the GLS-12 in the correct polarity. The station output
will be dead when the polarity is reversed.
2. Disconnect all other ground start equipment from the line. The GLS-12 may not work properly if
the line is left connected to a PBX or any other ground start equipment.