GEC PAX 50

50 line
private automatic exchange

STANDARD FEATURES
Maximum capacity
50 extension lines.

Connect circuits
Provision for 6 simultaneous conversations.

Numbering scheme
Within the range 20 to 75.

Executive's priority
Selected executives can break into an existing conversation: either the executive operates a pushbutton on the telephone* when he hears engaged tone, or the break-in can be effected automatically.

OPTIONAL FEATURES
Tie lines*
Up to 3 on one route only.

Conference*
Up to 10 designated extensions can be connected together via a special circuit.

Fire alarm*
Various procedures are available to suit individual requirements and local fire regulations.

Staff location*
Staff absent from their offices may be called by dialling a special locating number followed by a personal code, to operate lamps or bells.

Secretary service*
A secretarial switching telephone enables secretaries to filter calls to an executive.

Public exchange lines*
Up to 4, after the addition of a special attendant's cabinet.

GENERAL
Mode of operation
Fully automatic using uniselectors and relays.  All conversations secret from each other.

Tones and ringing
Electronic tone generators provide dial tone, ring tone and current, and busy tone.

Signalling
Required dial pulse characteristics: 7 to 14 i.p.s., 2:1 break to make ratio.

Alarms
Audible indication of blown fuse.

Power unit*
AC power unit: input 100 to 120v or 200 to 250v 50 to 60 Hz single phase; output, 26v d.c. 5A.
or
Battery: 26v 32AH; with float charger, input as for AC power unit; output 26v d.c. 3A.

Line loop resistance
Not to exceed 250 ohms.

Construction
Wired-in equipment mounted on a steel framework and contained in a steel cabinet (painted dark green) with lift-off dust-proof covers front and rear.

Dimensions and Weight

*To be specified when ordering

1968

GEC

Last revised: 18 November, 2000