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
Installation/Applications

A. Installing the SQRG-12 with the TMS-6X

VIKING ELECTRONICS, INC.
HUDSON, WI 54016
L4, L5, L6
MUSIC
RING VOLUME
SQRG-12 L1, L2, L3
USE ONLY
LISTED
CLASS 2
POWER
SOURCE
12-14 VAC
Rear View of the TMS-6X
Trunk Inputs of
PABX/KSU
1 - 6 C.O. Lines
Punch Down Terminal Block
with Split Center
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 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
Row 6
Loop/Ground
Start
Trunk Inputs
1T
1R
2T
2R
3T
3R
4T
4R
5T
5R
6T
6R
Row 4
Open
1. Wiring Table for the TMS-6X
2. Notes
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.

Note: For proper ground start operation,

JP1-JP12 must be removed in the

SQRG-12 as shown below.

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.
1 2 3 4 ON
OFF
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP10
JP11
JP12
Ground
Start
or
Ring All
Lines
Loop
Start
V/S
Note: Earth Ground is required
in ground start applications.

* Earth ground is only required in ground start applications.

Siemans # 566B3-50
Marconi # R66B3-50