How Many Foreign Exchange Office (FXO) Ports Are Provided?
VoIP gateways convert the PSTN signal to a VoIP signal. For analog lines, an FXO port is needed. Until recently, most reasonably priced ($300 to $500) VoIP gateways had only one or two FXO ports–sufficient for home use, but too few for most small businesses and remote offices. Make sure that any gateway you’re planning to buy at has at least four FXO ports. 6. What Type of IP Connectivity is Included? Today, there are two major standards-based protocols available to establish and maintain VoIP connections: the ITU-T H.323 specification and the Session Initiation Protocol (SIP). These protocols provide the functions that allow end users to place and receive VoIP calls. Your new gateway, obviously, needs to handle whatever standards are used on your VoIP network. 7. How Are Voice Digitization and Compression Accomplished? The key task required of any gateway is to convert the analog voice signal into the digital format that allows it to be transferred through a digital network. Usually,
