SB-4170 /TT Switchboard

© Brooke Clarke 2003 - 2013
SB-4170 /TT Switchboard
SB-4170 /TT Switchboard

Description

The SB-4170/TT is a 12 line manual switchboard.  It can be used with 12 2-wire lines or 6 4-wire lines.  It supports either dial or touch tone signaling.

 Prime power is 28 VDC using a KPT08F14-18SW connector where pin U and +28 VDC on pin J.  There are also 3 jumpers in the power connector: B to D, K to L, M to N.  As received the wiring inside the power connector cable was very bad and if powered up may have shorted out the 28 volt supply.  All the wiring in the connector needed to be redone.

Front Panel

SB-4170
                        /TT Switchboard

SB-4170
                        /TT Switchboard

SB-4170
                        /TT Switchboard

SB-4170
                        /TT Switchboard






Cards

Slot
Slot Type
Card


J1
Crosspoint
empty


J2
Crosspoint empty


J3
Crosspoint empty


J4
Crosspoint A1 Crosspoint


J5
Crosspoint A1 Crosspoint

J6
Crosspoint A1 Crosspoint

J7
Channel
Front Panel Connector


J8
Channel A17A1 NR1


J9
Channel A17A2 NR1


J10
Channel A2 Magneto Line Trunk


J11
Channel A3 DCC Trunk


J12
Channel A7 CB/CBS Line Circuit


J13
Channel A8 4 Wire Trunk


J14
Common
A6 Common


J15
Common Front Panel Connector

J16
Common A4 CPU


J17
Common A5 CPU Interface


J18
Power Supply
(DB-25) Power Supply & Keyboard


Rear Panel

SB-4170 /TT Switchboard SB-4170 /TT Switchboard SB-4170 /TT Switchboard
SB-4170 /TT Switchboard



Power Supply & Operator's Keyboard

I'm guessing the power supply can work from 110 to 240 VAC @ 50 or 60 Hz (F1 and/or F2) or from 10 to 30 VDC (F3).
It's modular construction.

SB-4170
                        /TT Switchboard
The keys with letters are for call precedence in order from highest to lowest:

  • FO = Flash Override
  • F = Flash
  • I = Immediate
  • P = Priority
  • R = Routine
  • C = Conference



SB-4170
                        /TT Switchboard

SB-4170
                        /TT Switchboard

PS1A4 Talk battery supply?

SB-4170
                        /TT Switchboard


PS1A2 System voltages power supply?

SB-4170/TT Switchboard


PS1 chassis with modules removed

SB-4170/TT Switchboard


PS1A3 Ring HV supply

SB-4170
                        /TT Switchboard


Rear of PS1
SB-4170/TT
                      Switchboard


Connectors


Description
SB-4170/TT
ID
Cable
AC/DC Power W1A2J1 GC 07A14-19P
MS3116E-14-19SW
MS3116E-14-19-SW SB-4170 Power Cable
                      Connector
A stock connector has
the wrong keyway rotation
Expansion

24-61 
(shell O.D. 1.496", 38.26mm)
?
Remote

25-00009-22-55SW
?

Power Connector Pin Out
Pin
Description

A, B
to transformer 1

C
to transformer 3
D
to transformer 2

E, F
to transformer 4
G
Fuse 1 (1A) center only switch ON
H
Fuse 2 (1A)  center only switch ON
J
Fuse 3 (3A) center only switch ON

K
U1

L


M


N


P
Fuse 1 (1A) outer

R
Fuse 2 (1A) outer

S, T, U, V
chassis ground

Transformer 1 to 3: 6.6 Ohms DC
Transformer 2 to 4 7.6 Ohms DC

Related

SB-22 Military manual switchboard
Panasonic KX-TA824 small business hybrid PBX
Phones - military, civilian
Cell Phones


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page created 21 Dec 2003 and updated 5 March 2013.