VIKING©
MODEL SQRG-12
VIKING ELECTRONICS, INC. HUDSON, WI 54016
SEQUENTIAL RING
GENERATOR
RJ21X RJ21X
J2 J1
TMS
CONTROL LINE
RESET
13.8V AC
1.25A MAX
POWER
1 2 3 4
1 2 3 4 ON
OFF
B. Installing the SQRG-12 with the TMS-12A
Rear View of the TMS-12A
Trunk Inputs of
PABX/KSU
Punch Down
Terminal Block with
Split Center
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 1
Ground/Loop
Start
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
Row 2
TMS-12A
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
44, Y/BN
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
Start
Trunk Inputs
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
7T
7R
8T
8R
9T
9R
10T
10R
11T
11R
12T
12R
Row 4
Open

1. Wiring Table for the TMS-12A

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.

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-12A.

Dip Switches for the TMS-12A
Loop Start
Switch
2
3
11
Position
Up
Down
Up
INPUTS/OUTPUTS
MUSIC
SQRG-12
TMS-RDMA
WARBLE
VOLUME
9 10 11 12
TMS-RDMA
USE ONLY
LISTED
CLASS 2
POWER
SOURCE
Viking Electronics, Inc.
Hudson, WI 54016

2. Notes

If the PABX does not recognize lines

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.

a.

b.

c.

1 - 12 C.O. Lines
Ground
Start
or
Ring All
Lines
Loop
Start
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12

Note: For proper ground start operation,

JP1-JP12 must be removed in the

SQRG-12 as shown below.

V/S
Note: Earth Ground is required
in ground start applications
Dip Switches for the TMS-12A
Ground Start
Switch
2
3
11
Position
Down
Up
Up
* Earth Ground is only required in ground start or “mast/slave” applications.
Siemans # 566B3-50
Marconi # R66B3-50