ZyXEL Communications P-2812HNU-51c, Руководство пользователя

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Chapter 9 Voice
P-2812HNU-51c User’s Guide
180
Bound Interface
Name
Bound Interface
Name
If you select LAN or Any_WAN, the P-2812HNU-51c automatically
activates the VoIP service when any LAN or WAN connection is up.
If you select Multi_WAN, you also need to select the pre-configured
WAN connections. The VoIP service is activated only when one of the
selected WAN connections is up.
RTP Port Range
Start Port
End Port
Enter the listening port number(s) for RTP traffic, if your VoIP service
provider gave you this information. Otherwise, keep the default values.
To enter one port number, enter the port number in the Start Port and
End Port fields.
To enter a range of ports,
• enter the port number at the beginning of the range in the Start
Port field.
• enter the port number at the end of the range in the End Port field.
DTMF Mode Control how the P-2812HNU-51c handles the tones that your telephone
makes when you push its buttons. You should use the same mode your
VoIP service provider uses.
RFC2833 - send the DTMF tones in RTP packets.
InBand - send the DTMF tones in the voice data stream. This method
works best when you are using a codec that does not use compression
(like G.711). Codecs that use compression (like G.729 and G.726) can
distort the tones.
SIPInfo - send the DTMF tones in SIP messages.
Transport Type
Transport Type
Select the transport layer protocol (TCP or UDP) used for SIP.
FAX Option This field controls how the P-2812HNU-51c handles fax messages.
G.711 Fax
Passthrough Select this if the P-2812HNU-51c should use G.711 to send fax
messages. The peer devices must also use G.711.
T.38 Fax Relay Select this if the P-2812HNU-51c should send fax messages as UDP or
TCP/IP packets through IP networks. This provides better quality, but it
may have inter-operability problems. The peer devices must also use
T.38.
QoS Tag
SIP DSCP Mark
Setting
Enter the DSCP (DiffServ Code Point) number for SIP voice
transmissions. The P-2812HNU-51c creates Class of Service (CoS)
priority tags with this number to voice traffic that it transmits.
RTP DSCP Mark
Setting Enter the DSCP (DiffServ Code Point) number for RTP voice
transmissions. The P-2812HNU-51c creates Class of Service (CoS)
priority tags with this number to RTP traffic that it transmits.
Timer Setting
Table 50 VoIP > SIP > SIP Service Provider (continued)
LABEL DESCRIPTION