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TTS
26B
Section 3
TABLE 3-1
Index No.
Control o r
Function
Indicator
10
LINE
(E)
key switch
P r o v i d e s for the connection of the following supervisory
and m e a s u r e m e n t functions toward the line:
1 . ON HOOK ( o p e r a t e d upward)
2 .
MONITOR ( n o r ma1 position)
3 .
O F F HOOK (operated downward)
DROP (M) key switch
P r o v i d e s for the connection of the following supervisory
and m e a s u r e m e n t functions toward the line:
1 . ON HOOK ( o p e r a t e d upward)
2.
MONITOR (nor ma1 position)
3 .
O F F HOOK (operated downward)
SEND turnbutton switch P r o v i d e s the following S E N D functions on the LOOP SIGNAL-
ING jacks SEND 1 and SEND 2:
1 .
SEND R T ON 1&2 ( o p e r a t e d clockwise)
2 .
SEND SLEEVES ( o p e r a t e d counter clockwise)
In n o r m a l u s e this switch should b e i n the SEND R T O N 1&2
position.
The p r i c i p a l u s e f o r the SEND SLEEVE position
is f o r s p e c i a l applications w h e r e d i r e c t a c c e s s to the SEN1
r e l a y a r m a t u r e , m a k e , and b r e a k c o n t a c t s i s d e s i r e d
SPARK
SUP
turnbutton
I n s e r t s a n i n t e r n a l s p a r k s u p p r e s s i o n c i r c u i t a c r o s s the
switch
SEND RELAY CONTACTS.
DROP toggle switch
D e t e r m i n e s the sending s t a t u s of the E l e a d , either ground
and open o r ground and b a t t e r y .
J a c k s
The following 310- type jacks a r e provided f r o m left to right:
1 .
EXT
DIAL ( f o r connecting a n e x t e r n a l d i a l , pulsing
s o u r c e , o r a telephone s e t )
2.
SEND RELAY ( f o r d i r e c t connection to the r e l a y contacts)
3.
LOOP SIGNALING
-
SEND 1
4.
LOOP SIGNALING
-
SEND 2
5.
LOOP SIGNALING
-
SEND B&G
6.
LOOP SIGNALING
-
R E C L O O P
7.
E A N D M
SIGNALING
-
R E C E & M
r
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