Tools 31 Sound Powred Phones

Question 0

Headsets

Answer 0

MIC AND two ear cups connected by steps that is worn around the back of users head 
Allows helmet to be worn 
Has male connector 
Less interference than handsets 
1620 key attached to headset

Question 1

Equipment for sound powered phones

Answer 1

2 headsets
2 1620 keys attached to headsets 
2 amplifiers 
"Y" connector
2 jumper cords 
t-handle subway key
Screwdriver ( to change amplifier)
4 glow sticks 
Laminated instruction sheet

Question 2

SPT Wire reel

Answer 2

400 foot long wire around wheel inside plastic case
3 foot fixed Wire coming out side of reel
Both ends have female connectors
Headset connected to fixed wire
Reels stored with end of long wire looped around handle

Question 3

Jumper cord

Answer 3

Is small wire with to male connectors

Used between two female connectors

Question 4

Y connector

Answer 4

Short section that is used to split the sound powered telephone system to allow additional communication points
Has one male and 2 female connections

Question 5

Amplifiers

Answer 5

Increase volume of verbal transmissions
Not required
Has two cords :
8” long cord with female connector that stitches to Hearst
42” long cord has male connector that attached to SPT system

Question 6

Amplifiers have two controls

Answer 6

1. Talk level knob that controls the volume and shall be placed in the highest setting when in use
2. PTA ( push to amplify ) button .. Must be pressed and held whenever the user wants to transmit message
   ONCE MESSAGE COMPLETE THE PTA BUTTON MUST BE RELEASED OR REPLY WILL NOT BR HEARD

Question 7

Using sound powered phones

Answer 7

1.Start and End points determined
2. Wire from bottom of reel pulled out a few feet and secured at starting point
Wire plays out as member carries reel towards end point
Need more than one reel jumper cords are used to connect the short wire of one reel to the long wire of next reel
4 once wire is stretched to end point listening devices and amplifiers are connected at each end
5 specific members shall be dedicated to maintain SPT link paired up with HT EQUIPT member
6 member using SPT must constantly li listen cause no ring or tone will be emitted
7, member using headset in standbys position ( awaiting transmission )should cover mouthpiece with hand to reduce background noise

Question 8

What is preferred listening device when using SPT

Answer 8

Headsets

Question 9

Street. Level boxes

Answer 9

Open with 1620 key
SPT connectors found near the standpipe Siamese with a sign that reads STREET To STATION COMMUNICATIONS
STANDPIPE SIAMESE with connector not always found closet to subway entrance
May always be found in middle of roadways

Question 10

Platform or Mezzanine level SPT connections

Answer 10

On platform or mezzanine located in red metal boxes inside stainless steel standpipe cabinets
open with 1620. Key
Cabinets ID by sign located above standpipe outlet showing a white hose on red background
Combo standpipe / SPT boxes may be located on columns or station wall
If no SPT outlet located in standpipe outlet box Look in surrounding area for small individual cabinet

Question 11

Street to tunnel systems

Answer 11

Usually include a specific pair of tubes
SPT connectors are typically located at street level connections closet to emergency exits on both sides of under river tubes
In under river tubes standpipe connectors are found at standpipe outlets approximately 200 feet a part
Standpipe outlets. Usually ID by #
Members operating in tube should notify IC of standpipe outlet #

Question 12

Sound powered phones installed in all under river tubes except

Answer 12

Joraleman street tunnel

Question 13

What is only required maintenance for us for the SPT system

Answer 13

Changing 9 volt battery in amplifier