AE 87A, Common Audible Circuit.

AE 87A, Schematic, This is the newer version using the self-compensating transmission network. It should be noted that earlier type 87 sets used a resistance as the hold path which caused severe transmission loss if inadvertently left connected during a conversation continued from a different station.

AE 87A, Wiring Diagram, This is the newer version using the self-compensating transmission network. It should be noted that earlier type 87 sets used a resistance as the hold path which caused severe transmission loss if inadvertently left connected during a conversation continued from a different station.

Type 880 Speakerphone wiring, Dial - Sheet 1 of 2.

Type 880 Speakerphone wiring, Dial - Sheet 2 of 2.

May 73. Wiring diagram from GSP 473-410-201 Issue 2.  Type 880B Speakerphone, Touch Calling. Scan provided by Steve Cichorsky.

AE 90A, Manually Compensated.

AE 90A, Printed Circuit Network.

AE 90A, Potted Network.

Type 981 or 982 Styleline, Rotary, Ae981-2r Tl

Type 981 or 982 Styleline, Ae981-2t Tl

AA-22 two-line. Contributed by Jim Hurtle, Rick Saint and Christopher Stewart.

AA-24-22 two-line. Contributed by Jim Hurtle.

AA-44-22 two-line. Contributed by Jim Hurtle.

Contributed by Jeff Lamb.

AE Desk Set Telephones, Type 21 Automatic Desk Set with Booster Circuit.

AE Desk Set Telephones, Type 21 Manual Desk Set with Series Circuit.

AE Desk Set Telephones, Type 21 desk stand using Western Electric 101A induction coil.

AE Desk Set Telephones, Type 21 Ringer Box.

AE Desk Set Telephones, Type 21 Manual Desk Set with Booster Circuit.