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.

Reference

TM 11-5805-262-12

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