Amazon.com: 2-Port VoIP SIP Phone Adapter - GT202 Wireless Router, Supports WiFi Asterisk ATA VOS FXS Fax. Suitable for Home or Business (Black) : Office Products
GSM Wireless to Analog Telephone Adapter
Telular SX5E GSM-850/1900 Voice Data Fax Model No. 1C02A161 w/ Adapter/battery | eBay
CJP-Geek AC Adapter compatible with Doro PhoneEasy 332 334 409 410s 410 GSM 410gsm Mobile Phone Easy Power Supply Cord Wall Charger (With Barrel Round Plug Tip ,Not USB Connector Tip) - Walmart.com