00330-1199 <90-00045>
P
AGE
11
F
IG
. 7 - S
WITCH
AND
S
TRAP
L
OCATIONS
, 49920
DTSS3A Backplane
Refer to Table F and Fig. 8 to set the straps and switches on the
Order Wire Backplane.
T
ABLE
F - S
WITCH
AND
S
TRAP
S
ETTINGS
, 00330 DTSS3A B
ACKPLANE
OPTION
Bridge Bypass
Bridge out of circuit
Bridge in circuit
Bridge Auxiliary Port
Terminated
Unterminated
Bridge Input Port
Terminated
Unterminated
J6
Chassis ground tied to signal ground.
Floating chassis ground.
J5
No external ringing generator.
External ringing generator (see Note 2 of Fig. 2).
J7
SETTINGS
S1 BYPASS *
S1 BRIDGE
S2 IN *
S2 OUT
S3 IN *
S3 OUT
IN *
OUT
IN *
OUT
Do not change.
* Factory Setting
F
IG
. 8 - S
WITCH
AND
S
TRAP
L
OCATIONS
, 00330 B
ACKPLANE
P2
1
6
7
19
1
20
2
J1
J2
S2
12
OUT
PORT 2
TERMINATION
S3
OUT
IN
PORT 4
TERMINATION
P3
PHONE
JACK
J4
P1
J3
S1
BY-PASS
BRIDGE
1
2
56
55
1
2
56
55
2
1
1
17
IN
J7
IN OUT
J5
IN OUT
J6
IN OUT
INSTALLATION
S2
ON
OFF
REV
NORM
INTERRUPT
STRAPS
TEST
ON
OFF
S1
R7
RING-BACK
TONE STRAPS
RING-BACK
TONE LEVEL
ACCESS
S1
FROM
FRONT
EXT
SPK
AUTO
BUZZER
