ITT - Cortelco Telephone Apparatus Practices Binders - TCI Library

1989 ITT - Cortelco Telephone Apparatus Practices - Contents

paul-f@verizon.net (Paul F) — Thu, 15 Jan 2026 13:00:23 -0800

Partial contents of a binder of IT&T practices. Includes section and issue numbers. Practices are grouped: Standard Telephones, Multibutton, Handsfree, and Trendline. Each phone type has a general description, replacement parts, and circuit labels (connections or wiring diagrams). Contributed by Paul Fassbender.

If a search for a section number does not return an individual practice, a google site search for the section number may return the file on Mike Neale's Kellogg reference page containing the practice. Other sections of the binder are found with 1989 Telephone Apparatus Practices here:
http://www.telephonecollectors.info/strombergcarlson/kellogg/kellogg_main.htm

ITT Telephone Apparatus Practices Binder i8 vol1 - Contents

paul-f@verizon.net (Paul F) — Thu, 15 Jan 2026 12:47:44 -0800

Undated. Contents of ITT 15-101600 issue 8 volume 1 binder of IT&T practices. Includes section and issue numbers. Practices are grouped: Standard Telephones, Multibutton, Handsfree, and Trendline. Each phone type has a general description, replacement parts, and circuit labels (connections or wiring diagrams). Contributed by Steph Kerman.

If a search for a section number does not return an individual practice, a google site search for the section number may return the file on Mike Neale's Kellogg reference page containing the practice, or you can look for Telephone Apparatus Practices here:
http://www.telephonecollectors.info/strombergcarlson/kellogg/kellogg_main.htm

1989 ITT Practices - Multibutton Telephones - Part 1

paul-f@verizon.net (Paul F) — Sun, 25 Feb 2024 22:10:14 -0800

157 pages. Covers rotary and tone desk key telephones. Contributed by Mike Neale. Scanned by Steve Cichorsky. OCR and bookmarks by Paul Fassbender.

50-565-100 i1, Jun82 - 6-Button, Rotary, Key - General Desc.
50-565-101 i2, Jul84 - 6-Button, Rotary, Key - Replacement Parts
50-565-102 i3, Jun86 - 6-Button, Rotary, Key - Circuit Labels

50-565-103 i1, Jun82 - 6-Button, Pushbutton, Key - General Description
50-565-104 i2, Apr84 - 6-Button, Pushbutton, Key - Replacement Parts
50-565-105 i2, Jun86 - 6-Button, Pushbutton, Key - Circuit Labels

50-576-100 i1, Jun82 - 3-Line, Rotary - General Description
50-576-101 i2, Jul84 - 3-Line, Rotary - Replacement Parts
50-576-102 i3, Jun86 - 3-Line, Rotary - Circuit Labels

50-830-100 i1, Jul82 - 10-Button, Rotary - General Description
50-830-101 i2, Jul84 - 10-Button, Rotary - Replacement Parts
50-830-102 i2, Jun86 - 10-Button, Rotary - Circuit Labels

50-830-103 i1, Jul82 - 10-Button, Pushbutton - General Description
50-830-104 i2, Jul84 - 10-Button, Pushbutton - Replacement Parts
50-830-105 i2, Jun86 - 10-Button, Pushbutton - Circuit Labels

50-831-100 i1, Jul82 - 20-Button, Rotary - General Description
50-831-101 i2, Jul84 - 20-Button, Rotary - Replacement Parts
50-831-102 i2, Jun86 - 20-Button, Rotary - Circuit Labels

50-831-103 i1, Jul82 - 20-Button, Pushbutton - General Description

-- Continued in Part 2 --

Other sections of the binder are found with 1989 Telephone Apparatus Practices here:
http://www.telephonecollectors.info/strombergcarlson/kellogg/kellogg_main.htm

1989 ITT Practices - Networks and PCBs

paul-f@verizon.net (Paul F) — Sun, 25 Feb 2024 21:32:36 -0800

39 pages. Covers networks and printed circuit boards. Contributed by Mike Neale. Scanned by Steve Cichorsky. Processed by Paul Fassbender.

Model Index:
180455 NETWORK TRENDLINE
181427 NETWORK PUSH TERM
182386 AUTO EXCLUSION PCB
182691 AUTO EXCLUSION PCB
183091 NETWORK
184059 CALL ANNOUNCE PCB 10/20
184130 NETWORK
185889 HANDSFREE PCB 10/20
186260 DUAL HOOKSWITCH FLASH PCB
187995 HOLD CIR PCB

Number Index:
55 455 119 NETWORK
55 427 119 NETWORK
55 386 135 AUTO EXCLUSION
55 691 135 AUTO EXCLUSION
55 059 135 CALL ANNOUNCE
55 130 119 NETWORKS
55 889 135 HANDSFREE
55 995 135 HOLD CIR

Other sections of the binder are found with 1989 Telephone Apparatus Practices here:
http://www.telephonecollectors.info/strombergcarlson/kellogg/kellogg_main.htm