Page 1
Telecommunication Peripheral Products
Technical Practice
SQRG-12
Sequential Ring
Generator
June 28, 2000
Allow Multiple Attendants to Answer Sequenced
Calls While Eliminating Call Crashing
The SQRG-12 Sequential Ring Generator is
designed for applications where more than
one person answers incoming calls and
those persons may be in locations where
the TMS-6X or TMS-12A is not visible.
The SQRG-12 eliminates confusion about
which line to answer next by displaying the
oldest call as a ringing line on all phones in
the phone system.
http://www.VikingElectronics.com
VIKING©
Features Applications
• Compatible with ground or loop start lines
• Re-rings calls held by Viking’s TMS-6X or
TMS-12A Call Sequencers
• Selectable ring cadence
• 10 REN load total
• Generate automatic oldest call notification for
the TMS-6X
• Generate automatic oldest call notification for
the TMS-12A
• Eliminates call crashing on outbound calls when
used with Viking’s TMS-6X or TMS-12A Call
Sequencers
Sales...(715) 386 - 8861
Made in the U.S.A.
Specifications
Power: 120V AC/13.8V AC 1.25A UL listed adapter provided
Dimensions: 210mm x 160mm x 44mm (8.25” x 6.25” x 1.75”)
Shipping Weight: 1.36 Kg (3 lbs)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-
condensing humidity
REN: 10.0
Connections: (2) RJ21X jacks, (1) RJ14 jack
Maximum Run: 305 m (1000 ft) between SQRG-12 and
sequencer
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Installation/Applications
A. Installing the SQRG-12 with the TMS-6X
Rear View of the TMS-6X
VIKING ELECTRONICS, INC.
HUDSON, WI 54016
SQRG-12 L1, L2, L3
RING VOLUME
MUSIC
L4, L5, L6
USE ONLY
LISTED
CLASS 2
POWER
SOURCE
12-14 VAC
J1
J2
RJ21X RJ21X
VIKING ELECTRONICS, INC. HUDSON, WI 54016
POWER
SEQUENTIAL RING
GENERATOR
VIKING©
MODEL SQRG-12
1 2 3 4
RESET
TMS
CONTROL LINE
13.8V AC
1.25A MAX
1 - 6 C.O. Lines
Siemans # 566B3-50
Marconi # R66B3-50
Punch Down Terminal Block
with Split Center
1. Wiring Table for the TMS-6X
Row 1
Loop/Ground
Start
C.O. Lines
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
*Earth Ground
Row 2
TMS-6X
L1, G
L1, R
L2, BK
L2, Y
L3, W
L3, BL
L4, G
L4, R
L5, BK
L5, Y
L6, W
L6, BL
Row 3
SQRG-12
Pin, Color
26, W/BL
1, BL/W
27, W/O
2, O/W
28, W/G
3, G/W
29, W/BN
4, BN/W
30, W/S
5, S/W
31, R/BL
3, BL/R
50, V/S
Row 4
Open
Row 5
SQRG-12
Pin, Color
38, BK/G
13, G/BK
39, BK/BN
14, BN/BK
40, BK/S
15, S/BK
41, Y/BL
16, BL/Y
42, Y/O
17, O/Y
43, Y/G
18, G/Y
* Earth ground is only required in ground start applications.
Row 6
Loop/Ground
Start
Trunk Inputs
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
Loop
Start
V/S
Ground
Start
or
Ring All
Lines
1 2 3 4
Note: Earth Ground is required
in ground start applications.
Trunk Inputs of
PABX/KSU
Note: For proper ground start operation,
JP1-JP12 must be removed in the
SQRG-12 as shown below.
JP12
JP11
JP10
JP9
JP8
JP7
JP6
JP5
JP4
JP3
JP2
JP1
ON
OFF
2. Notes
a. If the PABX does not recognize lines on the TMS-6X as busy and call crashing is observed, set up those lines
as “incoming only trunks” on the PABX. If those lines must be used for inbound and outbound calls, you must
use the special software TMX-PRAL. Contact product support at (715) 386-8666 for more information.
b. Do not install bridging clips on any connections which connect the two halves of the punch down terminal
block. Bridge clips should only be installed as a method of bypassing equipment.
c. In order for the SQRG-12 to work properly, the four-wire modular jack must be installed between the TMS
CONTROL LINE on the SQRG-12 and the SQRG jack on the TMS-6X or TMS-12A.
Page 3
B. Installing the SQRG-12 with the TMS-12A
9 10 11 12
Rear View of the TMS-12A
SQRG-12
WARBLE
TMS-RDMA
VOLUME
MUSIC
INPUTS/OUTPUTS
TMS-RDMA
USE ONLY
LISTED
CLASS 2
POWER
SOURCE
Viking Electronics, Inc.
Hudson, WI 54016
1 - 12 C.O. Lines
Dip Switches for the TMS-12A
Dip Switches for the TMS-12A
Loop Start
Switch
2
3
11
Ground Start
Switch
2
3
11
Position
Up
Down
Up
Position
Down
Up
Up
Siemans # 566B3-50
Marconi # R66B3-50
Punch Down
Terminal Block with
Split Center
1. Wiring Table for the TMS-12A
Row 1
Ground/Loop
Start
Row 2
TMS-12A
Pin, Color
C.O. Lines
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
7T
7R
8T
8R
9T
9R
10T
10R
11T
11R
12T
12R
*Earth Ground
* Earth Ground is only required in ground start or “mast/slave” applications.
26, W/BL
1,BL/W
27, W/O
2, O/W
28, W/G
3, G/W
29, W/BN
4, BN/W
30, W/S
5, S/W
31, R/BL
6, BL/R
32, R/O
7, O/R
33, R/G
8, G/R
34, R/BN
9, BN/R
35, R/S
10, S/R
36, BK/BL
11, BL/BK
37, BK/O
12, O/BK
44, Y/BN
Row 3
SQRG-12
Pin, Color
26, W/BL
1,BL/W
27, W/O
2, O/W
28, W/G
3, G/W
29, W/BN
4, BN/W
30, W/S
5, S/W
31, R/BL
6, BL/R
32, R/O
7, O/R
33, R/G
8, G/R
34, R/BN
9, BN/R
35, R/S
10, S/R
36, BK/BL
11, BL/BK
37, BK/O
12, O/BK
50, V/S
Row 4
Open
Row 5
SQRG-12
Pin, Color
38, BK/G
13, G/BK
39, BK/BN
14, BN/BK
40, BK/S
15, S/BK
41, Y/BL
16, BL/Y
42, Y/O
17, O/Y
43, Y/G
18, G/Y
44, Y/BN
19, BN/Y
45, Y/S
20, S/Y
46, V/BL
21, BL/V
47, V/O
22, O/V
48, V/G
23, G/V
49, V/BN
24, BN/V
Row 6
Ground/Loop
Trunk Inputs
Start
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
7T
7R
8T
8R
9T
9R
10T
10R
11T
11R
12T
12R
J1
J2
SEQUENTIAL RING
GENERATOR
VIKING©
MODEL SQRG-12
RJ21X RJ21X
VIKING ELECTRONICS, INC. HUDSON, WI 54016
Loop
Ground
Start
Start
or
V/S
Ring All
Lines
Note: Earth Ground is required
in ground start applications
Trunk Inputs of
PABX/KSU
Note: For proper ground start operation,
JP1-JP12 must be removed in the
SQRG-12 as shown below.
2. Notes
If the PABX does not recognize lines
a.
on the TMS-12A as busy and call
crashing is observed, set up those
lines as “incoming only trunks” on the
PABX. If those lines must be used for
inbound and outbound calls, set DIP
switch 3 to on and switch 2 to off, on
the TMS-12A.
Do not install bridging clips on any
b.
connections which connect the two
halves of the punch down terminal
block. Bridge clips should only be
installed as a method of bypassing
equipment.
In order for the SQRG-12 to work
c.
properly, the four-wire modular jack
must be installed between the TMS
CONTROL LINE on the SQRG-12 and
the SQRG jack on the TMS-12A.
1 2 3 4
POWER
RESET
TMS
CONTROL LINE
13.8V AC
1.25A MAX
1 2 3 4
ON
OFF
JP12
JP11
JP10
JP9
JP8
JP7
JP6
JP5
JP4
JP3
JP2
JP1
Page 4
Programming
J1
J2
RJ21X RJ21X
VIKING ELECTRONICS, INC. HUDSON, WI 54016
POWER
SEQUENTIAL RING
GENERATOR
VIKING©
MODEL SQRG-12
1 2 3 4
RESET
TMS
CONTROL LINE
13.8V AC
1.25A MAX
Switch
1 2 3 4
ON
OFF
1
2
3
4
Position
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Description
Receive line status data from the TMS-6X
Receive line status data from the TMS-12A
Ring cadence: 1 sec on, 3 sec off
Ring cadence: 2 sec on, 4 sec off
Unused
Unused (Leave in OFF position)
Unused
Unused (Leave in OFF position)
Operation
The SQRG-12 is a sequential ring generator option for use with the TMS-6X and TMS-12A. The SQRG-12 will re-ring
lines for the KSU/PABX based on line status information from the TMS-6X or TMS-12A.
The SQRG-12 is designed for applications where more than one person answers incoming calls, or in locations where
the TMS-6X or TMS-12A front panel display is not visible. The SQRG-12 eliminates confusion about which line to
answer next by only ringing the oldest call to the key system or PABX.
In some applications, it is desirable to have the SQRG-12 re-ring all calls that are ringing or holding within the call
sequencer. This is required in many PABX applications and some key system applications to prevent call crashing
(glare) problems when the C.O. lines connected to the TMS-6X or TMS-12A are also used for outgoing calls by the
PABX or KSU. The SQRG-12 is capable of this mode of operation when DIP switch 3 on the TMS-12A is in the on
position, or the TMS-6X has special software “TMS-PRAL” installed.
A. SQRG-12 Operation when Ringing Calls in Sequence
When the SQRG-12 is used with loop start C.O. lines, and you want the calls to ring through to the telephones in
sequence (one at a time), use J2 to block C.O. ringing from passing to the PABX or KSU. As a call rings in, the
TMS-6X or TMS-12A detects the ringing, and tells the SQRG-12 to ring that line through to the PABX or KSU (only if
this line is the oldest call). If a live operator does not answer, the TMS-6X or TMS-12A will answer the call, play the
message and put the caller on hold, while continuously commanding the SQRG-12 to re-ring that line into your
system. As new calls ring in on other lines, the SQRG-12 blocks these calls from ringing through to the PABX or
KSU until they have become the oldest call. Once an operator answers the oldest ringing call, the TMS-6X or TMS-
12A will begin ringing the next oldest call through to the PABX or KSU. This process of ringing calls through one at
a time will continue until the operators have answered all holding or ringing calls.
B. SQRG-12 Operation when Ringing All Calls
When the SQRG-12 is used with either loop or ground start C.O. lines, and you want all holding or ringing calls rerang through to the telephones, use J1 to pass tip ground (for ground start trunks), and ringing through to the PABX
or KSU. Note that the internal jumpers J1 through J12 must be removed any time you use the J1 jack. The J1 jack
is a straight through jack, so in the idle state, the C.O. tip and ring are passed straight through to the PABX or KSU.
When the TMS-6X or TMS-12A recognize that there is an incoming call on a line, the call sequencer commands the
SQRG-12 to re-ring that line along with any other lines that are ringing or holding. While the SQRG-12 is ringing a
given line position of the PABX or KSU, the SQRG-12 constantly maintains a grounded tip condition (for ground start
lines), supplies -48V DC battery on the ring side of the phone line and superimposes its high voltage ringing on this 48V DC. This is purposely part of the SQRG-12 design to give the ground trunk card in the PABX or KSU the
impression that the line is a ringing line that has never been answered, even though the TMS-6X or TMS-12A may
be holding a call on that line. All calls will continue to ring through to the PABX or KSU until the call is answered by
a live operator, or the caller hangs up (abandons).
Although the J1 jack was designed for ground start C.O. lines, it also works properly for loop start C.O. lines when
using the “ring all lines” mode.
Product Support Line...(715) 386-8666 Fax Back Line...(715) 386-4345
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking
Electronics, its affiliates and/or subsidiaries assume no responsibility for errors and/or omissions contained in this information. Revisions of
this document or new editions of it may be issued to incorporate such changes.
Printed in the U.S.A. ZF290950 Rev CFax Back Doc # 060
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