Operation Manual

Chapter 14 VoIP
LTE7410 User’s Guide
109
DTMF Mode Control how the LTE Device 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.726) can distort the tones.
SIPInfo - send the DTMF tones in SIP messages.
Transport Type
Transport Type
Select the transport layer protocol UDP or TCP (usually UDP) used for SIP.
FAX Option This field controls how the LTE Device handles fax messages.
G711 Fax
Passthrough
Select this if the LTE Device should use G.711 to send fax messages. The peer devices
must also use G.711.
T38 Fax Relay Select this if the LTE Device 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.
Outbound Proxy
Enable Select this if your VoIP service provider has a SIP outbound server to handle voice calls.
This allows the LTE Device to work with any type of NAT router and eliminates the need for
STUN or a SIP ALG. Turn off any SIP ALG on a NAT router in front of the LTE Device to
keep it from re-translating the IP address (since this is already handled by the outbound
proxy server).
Server Address Enter the IP address or domain name of the SIP outbound proxy server.
Server Port Enter the SIP outbound proxy server’s listening port, if your VoIP service provider gave
you one. Otherwise, keep the default value.
QoS Tag
SIP TOS Priority
Setting
Enter the DSCP (DiffServ Code Point) number for SIP message transmissions. The LTE
Device creates Class of Service (CoS) priority tags with this number to SIP traffic that it
transmits.
RTP TOS Priority
Setting
Enter the DSCP (DiffServ Code Point) number for RTP voice transmissions. The LTE Device
creates Class of Service (CoS) priority tags with this number to RTP traffic that it
transmits.
Timer Setting
Expiration
Duration
Enter the number of seconds your SIP account is registered with the SIP register server
before it is deleted. The LTE Device automatically tries to re-register your SIP account
when one-half of this time has passed. (The SIP register server might have a different
expiration.)
Register Re-send
timer
Enter the number of seconds the LTE Device waits before it tries again to register the SIP
account, if the first try failed or if there is no response.
Session Expires Enter the number of seconds the LTE Device lets a SIP session remain idle (without traffic)
before it automatically disconnects the session.
Min-SE Enter the minimum number of seconds the LTE Device lets a SIP session remain idle
(without traffic) before it automatically disconnects the session. When two SIP devices
start a SIP session, they must agree on an expiration time for idle sessions. This field is
the shortest expiration time that the LTE Device accepts.
Dialing interval selection
Dialing interval
selection
Enter the number of seconds the LTE Device should wait after you stop dialing numbers
before it makes the phone call. The value depends on how quickly you dial phone
numbers.
Table 41 VoIP > SIP > SIP Service Provider > Edit (continued)
LABEL DESCRIPTION