The Grandstream HT802 Analog Telephone Adapter is typically used to add a fax machine to your ring-u® system. However it can also be used to add any analog telephone device such as a ruggedized portable phone. It also benefits from automagic™ configuration with the ring-u Hello Hub PBXes.
 
Be aware that using this adapter for an analog fax machine also requires the "Analong Fax Machine Connection"  service for 24.95 a month vs the included (free) electronic fax to email provided with all of our ring-u service plans. See our Service Pricing page for details.