UAX intro
UAX1-4
UAX5
UAX6
UAX7
UAX8
UAX9-11
UAX12
MAX12
UAX13
MAX13
UAX14
UAX Buildings
UAX Forms
Switching Units
The UAX7 C unit housed junction relay sets and incoming parent group selectors. This unit was superseeded by the D and E units.
Shelf E:
This shelf housed the 'odds and ends' that is always needed in an exchange. The first four positions are taken up with common multi-metering equipment. Next was two jack in sets of alarm delay equipment, followed by the test number relayset. The final two relay sets housed alarm extension equipment.
Shelf D:
This accomodates 8 junction relays sets, for junctions to adjacent automatic exchanges.
Shelf C:
This accomodates uniselctors for use with the parent relay sets (for multi-metering), and also for use with the adjacent exchange relay sets.
Shelf B:
This accomodates 8 junction relay sets for junctions to the parent exchange.
Shelf A:
This can be used for parent first selectors, or for second selectors (used when there was a requirement for junctions to more than six other exchanges).
Again the top of the rack has the connection blocks for the first selector levels, and connections to other units.
This shelf housed the 'odds and ends' that is always needed in an exchange. The first four positions are taken up with common multi-metering equipment. Next was two jack in sets of alarm delay equipment, followed by the test number relayset. The final two relay sets housed alarm extension equipment.
Shelf D:
This accomodates 8 junction relays sets, for junctions to adjacent automatic exchanges.
Shelf C:
This accomodates uniselctors for use with the parent relay sets (for multi-metering), and also for use with the adjacent exchange relay sets.
Shelf B:
This accomodates 8 junction relay sets for junctions to the parent exchange.
Shelf A:
This can be used for parent first selectors, or for second selectors (used when there was a requirement for junctions to more than six other exchanges).
Again the top of the rack has the connection blocks for the first selector levels, and connections to other units.