ZyXEL Communications VOP1372G-61 User Manual page 12

Chapter 1 Introducing the VOP1372G
• AC impedance
• PCM companding law
• Cadence ring
• Flash time
• Pulse dial interval
• Pay-signal type
• Caller ID
• Service tones
Metallic Line Test
The VOP provides the following metallic line test (MLT) measurements.
• Foreign AC voltage (50Hz ~ 500Hz)
• Foreign DC voltage
• Hazardous potential test
• Three-element capacitance test
• Three-element resistance test
• Ringing equivalency number test (REN measurement)
• Metering voltage
• Dial tone
• Digit
• Receiver off hook
RTP Statistics
The VOP provides the following RTP statistics.
• RTP TX codec
• RTP RX codec
• RTP TX payload type
• RTP RX payload type
• RTP local IP/port
• RTP remote IP/port
Echo Cancellation
The device supports G.168, an ITU-T standard for eliminating the echo caused by the sound of your
voice reverberating in the telephone receiver while you talk.
Voice Activity Detection
Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting when you
are not speaking.
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VOP1372G-61 User's Guide