ZyXEL Communications V300 Betriebsanweisung PDF herunterladen (Seite 18)

V-300 Support Notes

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) could distort the tones.

Select SIP INFO to send the DTMF tones in SIP messages.

STUN

Use STUN if there is a NAT router between the IP Phone and the voice

service provider's SIP sever.You do not need to use STUN if the NAT router

is also a SIP ALG.

Outbound

Proxy

Enable this feature if your VoIP service provider has a SIP outbound server

to handle voce calls. This allows the IP Phone to work with any type of NAT

route and eliminates the ned for STUN or a SIP ALG. Turn off a SIP ALG on

a NAT router in front of the IP Phone to keep it from rtranslating the IP

address (since this is already handled by the outbound proxy server).

NAT Keep

Alive

You must have outbound proxy enabled to use NAT keep alive.Enable NAT

keep alive to have the Prstige send SIP notify mssages to the SIP server.

Use this to keep a NAT router located between the IP Phone and the SIP

server from timing out and dropping your IP Phone's SIP NAT sessions.

MWI

(Message

Waiting

Indication)

Enable Message Waiting Indication (MWI) to have your phone give you a

message–waiting (beeping) dial tone when you have a voice message(s).

Your voice service provider must have a messaging system that supports

this feature.

Expiration

Time

Use this field to set how long the SIP server should continue providing the

message waiting service after receiving a SIP SUBSCRIBE message from

the V300. The SIP server stops providing the message waiting service if it

has not received another SIP SUBSCRIBE message from the V300 before

this time period expires.

Call Forward

Table

Select which call forwarding table you want the V300 to use to block or

redirect calls. You can use a different call forwarding table for each SIP

account or use the same call forwarding table for both.

Back

Click Back to return to the previous screen without saving configuration

changes.

Apply

Click Apply to save your changes back to the V300.

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