Vintage Northern Telecom Tel-All 20 Telephone Line Checker – New Old Stock (NOS)

New old stock vintage telecommunications diagnostic tool manufactured by Northern Telecom Inc., Northeast Electronics Division, Concord, New Hampshire, USA.

Includes the original Tel-All 20 line checker, protective storage case, and instruction sheet.

Condition:

* New Old Stock (NOS).

* Vintage item with age-related storage marks and discoloration.

* Original instructions included, showing yellowing and wear from age.

* Protective storage case shows cosmetic storage wear.

* Please review all photographs for exact condition and included contents.

Features:

* Tests telephone line loop current.

* Identifies low loop current conditions.

* Detects reversed tip and ring wiring.

* Three LED indicators: OK, LOW, and REV.

* Modular telephone connector.

* Designed for telephone installation and troubleshooting.

Product Information:

* Brand: Northern Telecom / Nortel

* Model: Tel-All 20

* Part Number: A002000900

* Type: Telephone Line Checker

* Manufacturer: Northern Telecom Inc.

* Country of Manufacture: USA

Excellent vintage telecommunications equipment for collectors, technicians, and enthusiasts of legacy telephone systems.

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