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Charles Industries, LLC
An Amphenol Company

1450 American Lane
20th Floor
Schaumburg, IL
60173-5492 USA



Manufacture Discontinued Notice

Charles Industries has manufacture discontinued its 
621 Series T1 Apparatus Case product lines and all associated part numbers. 

Limited availability inventory remains for select part numbers, 
please call (847) 806-6300 for product availability and pricing. 

Click here for Charles' MD Notification with further details.

For technical support, please call (847) 806-8500.

621 Series T1 Apparatus Cases - Manufacture Discontinued

621 Series Apparatus Cases 621 Series Apparatus Cases provide weatherproof mounting facilities for 12, 25 or 50 T1 miniature line repeaters. The housing consists of a molded-plastic card cage, a molded-fiberglass baseplate, and a stainless steel cover that maintains pressure-tight integrity. The non-metallic baseplate improves corrosion resistance and isolates electrical surges due to lightning.

The housing may be mounted vertically on a pole, pedestal,  or against a wall in a manhole.

Each housing is equipped with a mechanism that allows the internal card cage to tilt approximately 45 degrees. This provides clearance and increases access to the rear of the card cage for test connection to cable pairs and insertion/ removal of gas tube protectors when the housing is mounted in an area with limited overhead access. The baseplate may be rotated on the mounting bracket in 90-degree increments, allowing three different orientations of the card cage.

621 Series T1 Apparatus Cases are available in two configurations, vented
with encapsulant-filled stubs for above-ground installation or pressurized with air-core stubs for manhole installations. Several optional wiring configurations and cable stub arrangements may be user-specified.

  • Stainless steel cover is durable and corrosion resistant.
  • A stainless steel V-band assembly firmly clamps the case cover to the baseplate O-ring seal. No tool is required for removal.
  • The latch assembly uses a T-handle on the tightening nut, and is not affected by ice. Tabs on the latch permit padlocking for security.
  • Wire-wrap pins interface between plug-in units inserted at the front of the card cage and lightning protection kits installed at the rear.
  • Retainer brackets prevent plug-in units from disconnecting when the housing is subjected to severe vibration.
  • Two cable stubs are secured in the housing baseplate through cable strain relief grips that screw onto the end of the hollow conical chambers extending through the housing baseplate, providing an airtight entrance seal.
  • Underside of baseplate includes an external Schrader valve (to allow housing to be easily pressurized and depressurized) or external vent (for vented units) and ground lug.


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