SB-22~PT

The SB-22/PT and the SB-22A/PT are tactical, manual switchboards that can be rapidly installed to provide field facilities for interconnecting 12 local-battery telephone circuits, remote controlled radio circuits, or voice frequency (VF) teletypewriter circuits. Two SB-22/PTs may be stacked to provide a 29-circuit capability by removing one TA-221/PT (operator’s pack) and inserting five TA-222/PTs (line packs). Replacing a line pack with a trunk pack permits one-way ring-down, and one-way automatic trunk circuits between the SB-22A/PT and any other switchboard with common-battery signaling. The Tone-Signaling Adapter TA-977/PT provides the operator with a two-wire push-button tone-signaling capability for interfacing automatic switches without operator intervention.

Technical Characteristics

Type of Operation

Manual with local battery

LineCapacity

12

Signaling(Outgoing)

90to100V AC,20Hz

Signaling(Outgoing) with adapter

DTMF

Signaling(Incoming)

90V AC,20Hz

Type of Signal

Audible or visual alarm

Power Requirement:

Operator’s Talking Circuit

3 V DC (two BA-30s)

Night Alarm and Panel Light

3 V DC (two BA-30s)

Weight

15.4kg(34lb)

Related Files

TM 11-5805-262-20P

ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LISTS FOR

SWITCHBOARDS, TELEPHONE, MANUAL

SB-22/PT (NSN 5805-00-257-3602)

SB-22A/PT (NSN 5805-00-715-6171)

May 1978

TM 11-5805-262-34P

DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE REPAIR PARTS AND

SPECIAL TOOLS LISTS (INCLUDING DEPOT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS)

SWITCHBOARDS, TELEPHONE, MANUAL

SB-22/PT (NSN 5805-00-257-3602)

SB-22A/PT (NSN 5805-00-715-6171)

May 1978