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Each field is described in the following table.
Table 78 VoIP > Call Rule
LABEL
Clear all speed
dials
Keys
Number
Description
Apply
Cancel
20.7 Technical Reference
This section contains background material relevant to the VoIP screens.
VoIP
VoIP is the sending of voice signals over Internet Protocol. This allows you to make phone calls and
send faxes over the Internet at a fraction of the cost of using the traditional circuit-switched
telephone network. You can also use servers to run telephone service applications like PBX services
and voice mail. Internet Telephony Service Provider (ITSP) companies provide VoIP service.
Circuit-switched telephone networks require 64 kilobits per second (Kbps) in each direction to
handle a telephone call. VoIP can use advanced voice coding techniques with compression to reduce
the required bandwidth.
SIP
The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol that handles
the setting up, altering and tearing down of voice and multimedia sessions over the Internet.
SIP signaling is separate from the media for which it handles sessions. The media that is exchanged
during the session can use a different path from that of the signaling. SIP handles telephone calls
and can interface with traditional circuit-switched telephone networks.
SIP Identities
A SIP account uses an identity (sometimes referred to as a SIP address). A complete SIP identity is
called a SIP URI (Uniform Resource Identifier). A SIP account's URI identifies the SIP account in a
way similar to the way an e-mail address identifies an e-mail account. The format of a SIP identity
is SIP-Number@SIP-Service-Domain.
VMG5313-B10A/-B30A Series User's Guide
DESCRIPTION
Click this to erase all the speed-dial entries on this screen.
This field displays the speed-dial number you should dial to use this entry.
Enter the SIP number you want the VMG to call when you dial the speed-dial number.
Enter a name to identify the party you call when you dial the speed-dial number. You can
use up to 127 printable ASCII characters.
Click this to save your changes and to apply them to the VMG.
Click this to set every field in this screen to its last-saved value.
Chapter 20 Voice
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