Putting a Modem/Router "combo device" (often supplied by ISPs such as AT&T or Comcast) in "Bridge Mode" effectively makes it work as a modem only.This will disable DHCP address assignment throughout your Local Area Network (LAN). You will need to use a separate router behind this device in this scenario.
A CODEC is a coder-decoder. The sound of a voice is digitized with a CODEC. The CODEC changes the sound of a voice to data (or data back to the sound of a voice).
IVR is an interactive voice response system, also known as an Automated Attendant. An Automated Attendant allows your PBX to respond to touchtone commands, for example, “press one for sales.” These systems are used in many ways, including routing calls, placing orders, answering in-bound calls etc.
Jitter is the variation in the time between voice data packets arriving to a destination. Jitter of 50ms (milliseconds) or less, as measured by our bandwidth test, is good. If higher, voice quality could be adversely affected.
Latency is the time it takes for your voice data packet to reach its’ destination. Latency of 150ms (milliseconds) or less, as measured by our bandwidth test, is good. If higher, voice quality could be adversely affected by a) echo and/or b) delayed voice delivery (resulting in one speaker interrupting the other).
QoS is an abbreviation for Quality of Service.You must have good QoS to have good quality phone calls. QoS is determined by how much bandwidth you have, how good the connection is, and if calls get priority over other network traffic.