Tandem Trunk, Busy Marking.
The purpose of this test is to verify that the
busy when seized.
b . Test Equipment and Materials. A Trunk Test Set, Stromberg-
Carlson 433871-018, is required for this test.
c . Test Connections and Conditions. The following test connec-
tions and conditions apply to this procedure.
(1) If the equipment must be kept in continuous operation,
perform this test during periods of light traffic.
(2) The busy position for all BSY switches is with the slot
horizontal. The normal position is with the slot vertical.
(3) When connecting the PATCH TO TRUNKS connector, on the
t e s t s e t , to the M plug, a s s o c i a t e d w i t h t h e t r u n k u n d e r t e s t , u s e
cord and plug assembly SC-207190-499, which is supplied with the
(4) When connecting the MULTI-FREQ SUPPLY connector, on the
test set, to the MF SUPPLY connector, on the trunk bay frame, use
cord and plug assembly SC-207190-599, which is supplied with the