Aug 20, 2013
Call control protocol: SIP(RFC-3261) or H.323 V4 or MGCP.
Echo cancellation: G.165/G.167 16ms.
IP Address: PPPoE, DHCP client, Static IP.
LCD Display: Dialed Number, Coin Value, Remaining Credit, Reminding Message, Self-Diagnostic Message, and Revenue Information.
Function Keys: Voice...