Folder No. 5 Crossbar - Wire Spring Relay Circuit - Vol 1
VOLUME I - WIRE SPRING No. 5 CROSSBAR SYSTEM
Section 1 — General Description of the Wire Spring No. 5 Crossbar System (129p)
Section 2 — Dial Tone Job (38p)
Section 3 — Dialing the Called Number (13p)
Section 4 — Pretranslation (22p)
Section 5 — Intraoffice Call (68p)
Section 6 — Outgoing Calls Using Senders (30p)
Section 7 — Incoming Calls (24p)
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