Close-Haul Communications

GAPfiller 900

GAPfiller Prototype

Close-Haul's flagship product, the GAPfiller, is a low-power GSM Access Point. GAPfiller networks can be set up anywhere that has Internet access and allow inexpensive GSM feature phones to make VoIP calls. Local voice calls and SMS text messages are free on GAPfiller networks. The GAPfiller is optimized for use with OpenBTS, an open source GSM software package. Prototype 900 MHz GAPfiller units are under evaluation by our beta customers. We intend to offer GAPfiller boards for sale to the OpenBTS community in the forseeable future.

Interested in the GAPfiller Early Access Program?

Subscribers to the Close-Haul e-mail newsletter will have the opportunity to purchase GAPfiller boards first.


OpenBTS is a trademark of Kestrel Signal Processing, Inc.