User's Manual

Chapter 15 VoIP
B222s User’s Guide
127
St art Port
End Port
Enter t he list ening port num ber( s) for RTP t raffic, if your VoI P service prov ider gave you
this inform at ion. Otherwise, keep t he default values.
To ent er one port num ber, enter t he por t num ber in t he St a r t Por t and End Por t fields.
To ent er a range of port s,
• ent er t he port num ber at t he beginning of t he range in the Sta r t Port field.
• ent er the port num ber at t he end of the range in the End Por t field.
DTMF Mode
Control how the LTE Device handles the t ones that your t elephone m akes when you push
it s but t ons. You should use the sam e m ode your VoI P serv ice pr ovider uses.
RFC2 8 3 3 - send t he DTMF t ones in RTP packet s.
PCM - send the DTMF t ones in the voice data stream . This m et hod works best when you
are using a codec t hat does not use com pression ( like G.711) . Codecs that use
com pression ( like G.729 and G.726) can distort t he t ones.
SI P I N FO - send t he DTMF t ones in SI P m essages.
Tr a n sp o r t Ty p e
Tr a n sp o r t Ty p e
Select the t ransport layer pr otocol UD P or TCP ( usually UDP) used for SI P.
FAX Opt ion This field cont rols how t he LTE Device handles fax m essages.
G711 Fax
Passt hr ough
Select this if t he LTE Device should use G.711 t o send fax m essages. The peer devices
m ust also use G.711.
T38 Fax Relay Select this if the LTE Device should send fax m essages as UDP or TCP/ I P packet s t hrough
I P net works. This provides bet t er qualit y, but it m ay have int er- operability problem s. The
peer devices m ust also use T.38.
Outbound Proxy
Enable Select t his if your VoI P service provider has a SI P out bound server t o handle voice calls.
This allows t he LTE Device t o work wit h any type of NAT rout er and elim inat es t he need
for STUN or a SI P ALG. Turn off any SI P ALG on a NAT r ou t er in front of t he LTE Dev ice t o
keep it from re- t ranslating t he I P address ( since t his is already handled by the outbound
proxy server) .
Server Addr ess Ent er the I P addr ess or dom ain nam e of t he SI P outbound proxy server.
Server Port Enter t he SI P out bound proxy server’s listening port , if your VoI P ser vice provider gave
you one. Otherwise, keep t he default value.
QoS Tag
SI P TOS Pr iority
Sett ing
Enter t he DSCP ( DiffServ Code Point ) num ber for SI P m essage t ransm issions. The LTE
Device creat es Class of Service (CoS) priority t ags wit h t his num ber t o SI P t raffic t hat it
transm it s.
RTP TOS Priority
Sett ing
Enter t he DSCP ( DiffServ Code Point ) num ber for RTP voice t ransm issions. The LTE Device
creat es Class of Service (CoS) priority t ags with t his num ber t o RTP t raffic t hat it
transm it s.
Tim er Setting
Expiration
Durat ion
Enter t he num ber of seconds your SI P account is registered wit h t he SI P regist er server
before it is delet ed. The LTE Device aut om at ically t ries t o re- regist er your SI P account
when one- half of t his t im e has passed. ( The SI P register server m ight have a different
expirat ion.)
Regist er Re- send
tim er
Ent er the num ber of seconds t he LTE Device wait s before it tries again t o register t he SI P
account, if t he first try failed or if t here is no response.
Session Expires Enter t he num ber of seconds t he LTE Device lets a SI P session rem ain idle (w ithout traffic)
before it autom atically disconnects the session.
Table 49 VoI P > SI P > SI P Service Provider ( cont inued)
LABEL DESCRIPTION