Telephone exchange circuit board hi-res stock photography and images

Telephone Exchange Circuit Board Stock Photo

RMAJTTE4–Telephone Exchange Circuit Board

Colorful telephone cable communication technology lines closeup Stock Photo

RFPDT0FR–Colorful telephone cable communication technology lines closeup

RFKT270P–Telephone exchange detail

Complex massy managed colorful telephone cable lines in analog PBX box Stock Photo

RFPDT0GC–Complex massy managed colorful telephone cable lines in analog PBX box

RFKRWAHG–Telephone exchange detail

RMANFME1–Telephone exchange centre

RFKRWEAK–Telephone exchange detail

RFDWDXWM–Telephone exchange

RFKRTYD7–Telephone exchange detail

Phone switch system and telephones isolated on white Stock Photo

RMG0GE8A–Phone switch system and telephones isolated on white

New telephone exchange system repairs itself or calls for help. Printed circuit board: a technician inserts a printed circuit board into place in the new U.S telephone exchange system. Thousands of the boards are used in a central telephone exchange. Mounted on the boards are transistors, semiconductor diodes and other electronic components, and metal 'teeth' on this end of the board make electrical connection with the rest of the equipment. Stock Photo

RMHHG59X–New telephone exchange system repairs itself or calls for help. Printed circuit board: a technician inserts a printed circuit board into place in the new U.S telephone exchange system. Thousands of the boards are used in a central telephone exchange. Mounted on the boards are transistors, semiconductor diodes and other electronic components, and metal 'teeth' on this end of the board make electrical connection with the rest of the equipment.

Old telephone switchboard with cables Stock Photo

RMB1MRAB–Old telephone switchboard with cables

RFCFKPTK–Analogic phone swiitch

Phone with green screen, dollar bill and litcoin coins isolated on black background Stock Photo

RF2BN44R7–Phone with green screen, dollar bill and litcoin coins isolated on black background

Antique telephone switchboard with chair and telephone directory Stock Photo

RF2A6MWGW–Antique telephone switchboard with chair and telephone directory

Frontal close-up of a PBX (private branch exchange), which is a phone exchange for a particular business/office. Stock Photo

RFD7FH1G–Frontal close-up of a PBX (private branch exchange), which is a phone exchange for a particular business/office.

Cables and switches of the old telephone exchange Stock Photo

RFJENY73–Cables and switches of the old telephone exchange

Vintage telephone switchboard Stock Photo

RM2WE0YR4–Vintage telephone switchboard

Telecommunication wires inside street phone junction box, England Stock Photo

RMGE8230–Telecommunication wires inside street phone junction box, England

Manual switchboard operators connected calls by inserting a pair of phone plugs into the appropriate jacks. 1953. Image From 4x5 inch negative. Stock Photo

RMTRJ29H–Manual switchboard operators connected calls by inserting a pair of phone plugs into the appropriate jacks. 1953. Image From 4x5 inch negative.

Wiring telephone connection box, technician standing in the snow and repair telephone line. Stock Photo

RF2FMC3ET–Wiring telephone connection box, technician standing in the snow and repair telephone line.

RM2Y6P2FA–Telephone Switchboard

Inside of an old fashioned analog telephone exchange Stock Photo

RFPYX3RP–Inside of an old fashioned analog telephone exchange

. American telephone practice . reason why such a jack should not be made to give per-fectly satisfactory operation. A system wherein the second method of supervisory signaling isemployed will now be considered. In this it will be remembered thatthe supervisory signal at the private branch exchange board, and notthat at the central office, is under the control of the private branchexchange subscriber. A private branch line circuit is shown at the left of Fig. 313. Thesignal in this is of the mechanical or gridiron type, already discussedin a previous chapter. This line is shown connected with Stock Photo

RM2CRX0XA–. American telephone practice . reason why such a jack should not be made to give per-fectly satisfactory operation. A system wherein the second method of supervisory signaling isemployed will now be considered. In this it will be remembered thatthe supervisory signal at the private branch exchange board, and notthat at the central office, is under the control of the private branchexchange subscriber. A private branch line circuit is shown at the left of Fig. 313. Thesignal in this is of the mechanical or gridiron type, already discussedin a previous chapter. This line is shown connected with

Color image of an old telephone exchange wit many wires. Stock Photo

RFH759GY–Color image of an old telephone exchange wit many wires.

RME54N90–Telephone exchange

RFJE5H86–OLYMPUS DIGITAL CAMERA

RFKRTYD0–Telephone exchange detail

Phone switch system and telephone set Stock Photo

RMFYYX2X–Phone switch system and telephone set

RFKRTGKF–Telephone exchange detail

RMB1MXBY–Old telephone switchboard with cables

Red lan cable rj45 connectors category 6 Stock Photo

RFHAR6YB–Red lan cable rj45 connectors category 6

100 dollar banknote, phone with green screen and ripple coin isolated on black background Stock Photo

RF2BN44X9–100 dollar banknote, phone with green screen and ripple coin isolated on black background

Antique Vintage Telephone Switchboard and red armchair, Communication Connection station Concept Stock Photo

RFTDB598–Antique Vintage Telephone Switchboard and red armchair, Communication Connection station Concept

Shallow depth of field close-up of a PBX (private branch exchange), which is a phone exchange for a particular business/office. Stock Photo

RFD7FH1W–Shallow depth of field close-up of a PBX (private branch exchange), which is a phone exchange for a particular business/office.

An old telephone exchange in an abandoned hotel reception Stock Photo

RFJENY7E–An old telephone exchange in an abandoned hotel reception

RM2WE0YPT–Vintage telephone switchboard

kind of wiring closet patch panels with 6-th category in the background Stock Photo

RFEPW6M2–kind of wiring closet patch panels with 6-th category in the background

technician is plugging in a network cable to the line socket. Stock Photo

RFRD9C30–technician is plugging in a network cable to the line socket.

Technician working in the snow and repair telephone line, wiring telephone connection box. Stock Photo

RF2FMC30P–Technician working in the snow and repair telephone line, wiring telephone connection box.

RFM12B6P–Retro telephone exchange

RFPYX3T6–Inside of an old fashioned analog telephone exchange

. American telephone practice . TE-BRANCH EXCHANGE SWITCH-BOARD. which may be done by merely throwing her telephone in circuit bymeans of her listening key. It may also be done by plugging in to theshort-circuited jack. In Fig. 316 is shown a type of private branch exchange boardwhich is representative of good practice. By providing a desk atwhich the attendant may sit, she is thus enabled to attend to otherwork than that of operating the exchange, particularly in caseswhere there is not enough telephone work to keep her busy. Thistype of board is manufactured by the Kellogg Switchboard and Su Stock Photo

RM2CRX0YF–. American telephone practice . TE-BRANCH EXCHANGE SWITCH-BOARD. which may be done by merely throwing her telephone in circuit bymeans of her listening key. It may also be done by plugging in to theshort-circuited jack. In Fig. 316 is shown a type of private branch exchange boardwhich is representative of good practice. By providing a desk atwhich the attendant may sit, she is thus enabled to attend to otherwork than that of operating the exchange, particularly in caseswhere there is not enough telephone work to keep her busy. Thistype of board is manufactured by the Kellogg Switchboard and Su

RFH9BXF5–Color image of an old telephone exchange wit many wires.

RME54N8W–Telephone exchange

technician on the phone fixing a pc Stock Photo

RF2PG0F8F–technician on the phone fixing a pc

elements of the old telephone exchange Stock Photo

RFKYMWP9–elements of the old telephone exchange

Phone switch system and digital telephone set isolated on white Stock Photo

RMG0GRMN–Phone switch system and digital telephone set isolated on white

RFKRTGKH–Telephone exchange detail

Antique Telephone Switchboard, Communication Connection Concept Stock Photo

RM2AYB246–Antique Telephone Switchboard, Communication Connection Concept

RFKRJYY4–Telephone exchange detail

Litecoin golden coins between dollar bill and phone with green screen isolated on black background Stock Photo

RF2BN44R4–Litecoin golden coins between dollar bill and phone with green screen isolated on black background

RMB1MTYR–Old telephone switchboard with cables

RFD7FH1N–Shallow depth of field close-up of a PBX (private branch exchange), which is a phone exchange for a particular business/office.

RFJENY87–An old telephone exchange in an abandoned hotel reception

RM2WE0YR0–Vintage telephone switchboard

Electric elements and connection of old telecommunication machine. Part of retro telephone exchange. Stock Photo

RFJENY5X–Electric elements and connection of old telecommunication machine. Part of retro telephone exchange.

Worker in telephone exchange Stock Photo

RMPHRJAC–Worker in telephone exchange

RFEPW6M5–kind of wiring closet patch panels with 6-th category in the background

RMPHRAJB–Worker in telephone exchange

RFMY396Y–Worker in telephone exchange

. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . JprckonToll r=, Ji—i-board Q Fig. 249.—Toll selector. real third selector or not depends upon the size of the exchange. Inany case this is the switch which feeds battery to the called telephone.This switch functions as an ordinary selector, except that the oper-ating relay OpRy takes the place of the usual line relay and is controlled LONG DISTANCE AND SUBURBAN EQUIPMENT 293 over the operating trunk, P-l. The talking circuit, indicated by theheavy lines, is entirely separate from the rest of the selector. Stock Photo

RM2CRX42M–. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . JprckonToll r=, Ji—i-board Q Fig. 249.—Toll selector. real third selector or not depends upon the size of the exchange. Inany case this is the switch which feeds battery to the called telephone.This switch functions as an ordinary selector, except that the oper-ating relay OpRy takes the place of the usual line relay and is controlled LONG DISTANCE AND SUBURBAN EQUIPMENT 293 over the operating trunk, P-l. The talking circuit, indicated by theheavy lines, is entirely separate from the rest of the selector.

RM2CMTX4C–kind of wiring closet patch panels with 6-th category in the background

RFH9BXCY–Color image of an old telephone exchange wit many wires.

RME54N8R–Telephone exchange

Cordless telephone icons set, cartoon style Stock Vector

RFMJY3BD–Cordless telephone icons set, cartoon style

RFKRJYY5–Telephone exchange detail

100 dollar bill, phone with green screen and dogecoin isolated on black background Stock Photo

RF2BN454X–100 dollar bill, phone with green screen and dogecoin isolated on black background

RFKRJKY5–Telephone exchange detail

Shallow depth field close-up PBX (private branch exchange) which is phone exchange for particular business/office. technician Stock Photo

RFD7FH22–Shallow depth field close-up PBX (private branch exchange) which is phone exchange for particular business/office. technician

RMB1MPD5–Old telephone switchboard with cables

RM2WE0YPY–Vintage telephone switchboard

RFJENY6D–Electric elements and connection of old telecommunication machine. Part of retro telephone exchange.

patch panel of the 6th category closeup, blue tone Stock Photo

RFEPW6M6–patch panel of the 6th category closeup, blue tone

rear view of a patch panel with wires Stock Photo

RFDKH3JY–rear view of a patch panel with wires

. The Street railway journal . TELEPHONE ROOM, SHOWING DESPATCHERS BOARD ANDCENTRAL EXCHANGE FOR BUILDING d. c. buses. Two feeders to each floor leave the separatelighting panels, one feeder going direct to a cabinet in theeast end of the building, while the other reaches a cabinet inthe opposite end. Other feeders connect the two cabinetswith a third, forming a loop circuit, so that in the event of failure of one of the feeders the other can be used to lightthe whole floor. The wiring also permits current from citherthe d. c. or a. c. bus-bars to be supplied to each separate floor. VACUUM CLE Stock Photo

RM2CGYFTJ–. The Street railway journal . TELEPHONE ROOM, SHOWING DESPATCHERS BOARD ANDCENTRAL EXCHANGE FOR BUILDING d. c. buses. Two feeders to each floor leave the separatelighting panels, one feeder going direct to a cabinet in theeast end of the building, while the other reaches a cabinet inthe opposite end. Other feeders connect the two cabinetswith a third, forming a loop circuit, so that in the event of failure of one of the feeders the other can be used to lightthe whole floor. The wiring also permits current from citherthe d. c. or a. c. bus-bars to be supplied to each separate floor. VACUUM CLE

RM2CMTXWX–kind of wiring closet patch panels with 6-th category in the background

RFH67CH1–Color image of an old telephone exchange wit many wires.

RM2CMX66Y–rear view of a patch panel with wires

RME54N8T–Telephone exchange

RM2CMW586–rear view of a patch panel with wires

RFMPWK72–Worker in telephone exchange

rear view of the patch panels Stock Photo

RFE4WE13–rear view of the patch panels

Cordless equipment icons set, cartoon style Stock Vector

RFMJY3K5–Cordless equipment icons set, cartoon style

Ripple coin between dollar banknote and phone with green screen isolated on black Stock Photo

RF2BN44XM–Ripple coin between dollar banknote and phone with green screen isolated on black

RFKRJKY8–Telephone exchange detail

RFD7GHGR–Shallow depth field close-up PBX (private branch exchange) which is phone exchange for particular business/office. technician

RFR6CM84–Retro telephone exchange

RM2CMY4F4–kind of wiring closet patch panels with 6-th category in the background

RF2BR7N52–Antique Vintage Telephone Switchboard and red armchair, Communication Connection station Concept

patch panel of the 6th category Stock Photo

RM2CMWM5D–patch panel of the 6th category

RM2CMW2XM–kind of wiring closet patch panels with 6-th category in the background

RFDKH1FP–rear view of a patch panel with wires

. The practical telephone handbook and guide to the telephonic exchange . Fig. 205 been to provide a small battery of dry cells in each extension-line cord circuit of a single-cord board, as shown in Fig. 204,the battery of two cells being included in the tip-conductorcircuit, as shown at x b. It will be noticed that a condenseris included in the indicator circuit, and a magneto-generatoris attached to the extension instrument for signalling purposes.Fig. 205 shows the connections of the exchange junction SMALL SWITCH-BOARDS 179 line, and Fig. 206 those of the service or main instru-ment attac Stock Photo

RM2CRXG52–. The practical telephone handbook and guide to the telephonic exchange . Fig. 205 been to provide a small battery of dry cells in each extension-line cord circuit of a single-cord board, as shown in Fig. 204,the battery of two cells being included in the tip-conductorcircuit, as shown at x b. It will be noticed that a condenseris included in the indicator circuit, and a magneto-generatoris attached to the extension instrument for signalling purposes.Fig. 205 shows the connections of the exchange junction SMALL SWITCH-BOARDS 179 line, and Fig. 206 those of the service or main instru-ment attac

RFW12164–kind of wiring closet patch panels with 6-th category in the background

RFHNMDPR–Color image of an old telephone exchange wit many wires.

Cordless technology icons set, cartoon style Stock Vector

RFMJY3FA–Cordless technology icons set, cartoon style

Phone with green screen between dollar bill and bitcoin, ethereum and dogecoin isolated on black Stock Photo

RF2BN4573–Phone with green screen between dollar bill and bitcoin, ethereum and dogecoin isolated on black

RM2CMTYCD–kind of wiring closet patch panels with 6-th category in the background

. The practical telephone handbook and guide to the telephonic exchange . ls, giving 24 volts, are employed. Thisincreased voltage is used in order to keep up the voice trans-mission to the proper standard, as it has been found that up toabout 300w resistance in the line circuit the transmission withthe Stone system is not so good as with the Hayes system.* The No. 9 sections are 6 ft. 3 in. high, 2 ft. 5 in. wide in front,and 2 ft. 9 in. in depth from front to back including key-board. Up to 15 pairs of cords may be fitted to one section,the corresponding number of pairs of supervisory signal Stock Photo

RM2CRX7DW–. The practical telephone handbook and guide to the telephonic exchange . ls, giving 24 volts, are employed. Thisincreased voltage is used in order to keep up the voice trans-mission to the proper standard, as it has been found that up toabout 300w resistance in the line circuit the transmission withthe Stone system is not so good as with the Hayes system.* The No. 9 sections are 6 ft. 3 in. high, 2 ft. 5 in. wide in front,and 2 ft. 9 in. in depth from front to back including key-board. Up to 15 pairs of cords may be fitted to one section,the corresponding number of pairs of supervisory signal

Telephone exchange circuit board Stock Photos and Images

Telephone exchange circuit board Stock Photos and Images

Download Confirmation

Password Confirmation

Search Results for Telephone exchange circuit board Stock Photos and Images (127)

Filter by agency collections

Search builder

Get great features with your free account

Get inspired for your next project!