You are here: Home > Browse the Library > BSPs (Bell System) > Most Popular > 518 Key Tel Sys

Check out the TCI YouTube channel here. Please subscribe!

Check here for the 2024 Telephone Shows

Folder 518 Division - KTS, Video, Switching...

Key Telephone Systems, Video Telephone Stations, and Switching Systems - Customer Equipment

Documents

pdf 518-240-100 300-301-302-310-311 KSU's I.D. And Description Popular

By 957 downloads

Download (pdf, 3.88 MB)

518-240-100 300-301-302-310-311 KSU's I.D. and Description.pdf

518-240-100 300-301-302-310-311 KSU's I.D. And Description

pdf 518-240-100 I1 Popular

By 741 downloads

Download (pdf, 3.88 MB)

518-240-100_I1.pdf

518-240-100 I1

Contributed by Russ Kirk.

pdf 518-245-101 ~ 2301-Series Key Service Units ~ I.D. And Connections Popular

By 835 downloads

Download (pdf, 223 KB)

518-245-101 ~ 2301-Series Key Service Units ~ I.D. and Connections.pdf

518-245-101 ~ 2301-Series Key Service Units ~ I.D. And Connections

pdf 518-250-101 501 - 502-Type KSU I.D. - Installation Popular

By 1057 downloads

Download (pdf, 674 KB)

518-250-101 501 - 502-Type KSU I.D. - Installation.pdf

518-250-101 501 - 502-Type KSU I.D. - Installation

pdf 518-255-401 - 550 And 551 KSU Issues 3 And 4 Popular

By 1139 downloads

Download (pdf, 577 KB)

550 and 551 KSU Issues 3 and 4.pdf

518-255-401 - 550 And 551 KSU Issues 3 And 4
Contains both Issue 2, April 1966 and Issue 4, March 1968.

pdf 518-255-401-i3-550-551-KSUs Tl Popular

By 777 downloads

Download (pdf, 332 KB)

518-255-401-i3-550-551-KSUs_tl.pdf

pdf 518-255-401-i4-550-551-KSUs Tl Popular

By 804 downloads

Download (pdf, 253 KB)

518-255-401-i4-550-551-KSUs_tl.pdf

pdf 518-270-101 I2 1A2 Panels - 583 & 584-types Popular

By 929 downloads

Download (pdf, 6.62 MB)

518-270-101_I2_Jun66_1A2_Panels_583_584_Types.pdf

518-270-101 I2 1A2 Panels - 583 & 584-types
June 1966.  Contributed by Steve Cichorsky.

pdf 518-270-401 I4 1A2 Panels - 583 & 584-types - Conn & Maint Popular

By 794 downloads

Download (pdf, 699 KB)

518-270-401_I4_Jan68_1A2_Panels_583_584_Types_ConnMaint.pdf

518-270-401 I4 1A2 Panels - 583 & 584-types - Conn & Maint
January 1968.  Contributed by Steve Cichorsky.

pdf 518-300-100-i1-CENT KEY TELE INSTAL Tl Popular

By 731 downloads

Download (pdf, 2.48 MB)

518-300-100-i1-CENT_KEY_TELE_INSTAL_tl.pdf

pdf 518-300-413 I4 Popular

By 647 downloads

Download (pdf, 330 KB)

518-300-413_I4.pdf

518-300-413 I4
[Extracted from KSSM, i6, July 1980 by Sam Etler]

pdf 518-300-413 Tl Popular

By 774 downloads

Download (pdf, 122 KB)

518-300-413_tl.pdf

pdf 518-300-417 I1 Popular

By 742 downloads

Download (pdf, 161 KB)

518-300-417_I1.pdf

518-300-417 I1
[Extracted from KSSM, i6, July 1980 by Sam Etler]

pdf 518-300-417 Tl Popular

By 785 downloads

Download (pdf, 212 KB)

518-300-417_tl.pdf

pdf 518-310-113 ~ 247A KTU I.D., Installation, Maintenance Popular

By 874 downloads

Download (pdf, 1.10 MB)

518-310-113 ~ 247A KTU I.D., Installation, Maintenance.pdf

518-310-113 ~ 247A KTU I.D., Installation, Maintenance

BELL SYSTEM PRACTICES
SECTION 518-310-113
Plant Series
Issue 1, February 1968
AT&TCo Standard

247A KEY TELEPHONE UNIT IDENTIFICATION, INSTALLATION, AND MAINTENANCE

pdf 518-310-400-i1-213B-KTU Tl Popular

By 736 downloads

Download (pdf, 1.23 MB)

518-310-400-i1-213B-KTU_tl.pdf

pdf 518-310-401 I2 Popular

By 743 downloads

Download (pdf, 1.92 MB)

518-310-401_I2.pdf

518-310-401 I2
[Extracted from KSSM, i6, July 1980 by Sam Etler]

pdf 518-310-401-i2-227A B KTU Tl Popular

By 848 downloads

Download (pdf, 889 KB)

518-310-401-i2-227A_B_KTU_tl.pdf

pdf 518-310-403 I3 KTU 232A & 232B (Interrupter) Popular

By 948 downloads

Download (pdf, 1.46 MB)

518-310-403_I3_Apr68_232A_232B_KTU_Interrupters_ ID_Connections.pdf

518-310-403 I3 KTU 232A & 232B (Interrupter)
April 1968. Contributed by Steve Cichorsky.

pdf 518-310-403 I3 Apr68 232A 232B KTU Interrupter Popular

By 1145 downloads

Download (pdf, 269 KB)

518-310-403_i3_Apr68_232A_232B_KTU_Interrupter.pdf

518-310-403 I3 Apr68 232A 232B KTU Interrupter

Contributed by John Novack. 

New User?

Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Jim Hurtle, Ed Palazzo, Paul Fassbender, Bruce Patterson, Remco Enthoven, Jon Kolger, Paul Ivester, Len Hicken, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Alan David, Dennis Hock, and Tim Griffin.

Please send a file to add your name to this list!

Who's online

We have 910 guests online