Bell System Practices 505C PBX Service Manual

This page identifies the Bell System Practices documentation available for the 505C PBX. The exact records listed below are included in the complete digital Bell System Practices collection.

Documentation availableDigital delivery by email

Open Bell System Practices Bundle — Part 1

The complete collection requires Part 2 as well. Individual documents are not sold separately.

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Available documentation

  • B522.215 INSTALLATION OF NO. 505-B, NO. 505-C, NO. 506-A, AND NO. 506-B PBX'S
  • B522.251 MODIFICATION FOR ANTI-SIDETONE CONNECTIONS 505 AND 506 TYPE PBX'S

How these documents can help

Depending on the listed document, the material can support model identification, installation, connection checks, maintenance, servicing and historical technical research. The page does not add specifications that are not stated in the source documentation.

Bundle and delivery information

Only the complete two-part digital bundle can be purchased. After purchase, the download link is sent by email. Nothing physical is shipped.

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