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In peer-to-peer calls, you call another VoIP device directly without going through a
SIP server. Enter the callee's IP address or domain name. The MAX208M2W Series
sends SIP INVITE requests to the peer VoIP device when you use the speed dial
entry.
You do not need to configure a SIP account in order to make a peer-to-peer VoIP
call.
DTMF
Dual-Tone Multi-Frequency (DTMF) telephone call signaling uses pairs of
frequencies (one lower frequency and one higher frequency) to set up calls. It is
also known as Touch Tone. Each of the keys on a DTMF telephone corresponds to a
different pair of frequencies.
Supplementary Phone Services Overview
Supplementary services such as call hold, call waiting, call transfer, etc. are
generally available from your VoIP service provider. The MAX208M2W Series
supports the following services:
• Call Waiting
• Call Forwarding
• Caller ID
• Hotline
Note: To take full advantage of the supplementary phone services available though
the MAX208M2W Series's phone port, you may need to subscribe to the
services from your VoIP service provider.
MAX208M2W Series User's Guide
Chapter 10 The VoIP Account Screens
143
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