AX301 can simply convert FXS port of VOIP to FXO. Once there is a ring from VOIP, if connect to the CO line immediately, so the user can dial out from CO line. In opposition, when the ring is from the CO line, it will connect to VOIP immediately. Til... - Update: 2009-10-13

AX520 has 2 line jacks and one phone jack. The line jacks can connect to PSTN line and VOIP line. Whenever there is a ring from either of them, the phone can ring and answer. When the user wants to make a phone call, it goes through LINE1 jack automa... - Update: 2009-10-13

AX522 can put 2-line to share one terminal device, such as cordless phone, fax, key phone system, etc. After opening land line network in Taiwan caused one case. The problem is no more port free when installed land line to enterprise, almost ports a... - Update: 2009-10-13