ZyXEL Communications LTE3311 series - Page 124

Chapter 17 Voice over IP
LTE3311 Series User’s Guide
124
call, you need to enable and configure a SIP account. The SIP account contains information that
allows your LTE3311 to connect to your VoIP service provider.
Use this screen to maintain information about your SIP account, and configure the SIP server
information. To access this screen, click Application > Voice over IP > SIP Conf..
Figure 80 Application > Voice over IP > SIP Conf.
The following table describes the labels in this screen.
Table 57 Application > Voice over IP > SIP Conf.
LABEL DESCRIPTION
Port Configuration
SIP Port Enter the SIP server’s listening port number, if your VoIP service provider gave you one.
Otherwise, keep the default value.
RTP Port Enter the listening port number(s) for RTP traffic, if your VoIP service provider gave you
this information. Otherwise, keep the default values.
DTMF Setting Control how the LTE3311 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 DTMF - 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.
Send DTMF SIP Info - send the DTMF tones in SIP messages.
Options
SIP Expire Time Enter the number of seconds the LTE3311 lets a SIP session remain idle (without traffic)
before it automatically disconnects the session.
DNS SRV Select Enable to have the LTE3311 use DNS procedures to resolve the SIP domain and
find the SIP server’s IP address, port number and supported transport protocol(s).
The LTE3311 first uses DNS Name Authority Pointer (NAPTR) records to determine the
transport protocols supported by the SIP server. It then performs DNS Service (SRV)
query to determine the port number for the protocol. The LTE3311 resolves the SIP
server’s IP address by a standard DNS address record lookup.
Apply
Click this to save your changes and to apply them to the LTE3311.
Cancel Click this to set every field in this screen to its last-saved value.
Service Domain
Conf.
Click this to open a screen where you can maintain information about the SIP service
domain. See Section 17.7.1 on page 125.
Codec Conf. Click this to open a screen where you can configure codec priority. See Section 17.7.2
on page 126.