VoIP Specialists available in High Definition 8:30am–6:30pm weekdays. — Toll Free: 1-800-398-8647
We Ship Internationally
Combination FXO - FXS VoIP adapters
Educational Resources
Customer Programs
VoIP Adapters With PSTN Failover
Get a VoIP adapter with PSTN failover today.
Choose from a variety of combination FXS – FXO VoIP adapters at VoIP Supply. Use the FXS port to connect your traditional telephone or fax machine to your network and connect your POTS via the FXO port for local dialing and failover capability. All of the combination FXS – FXO VoIP dapters VoIP Supply carries are SIP compliant, fully supported by our in-house experts and come with a full manufacturers warranty.
Don’t miss out – save big on the VoIP adapters below.
Hot Product
New ProductShop by manufacturer: Cisco adapters, Grandstream adapters, Linksys adapters
