ZyXEL Communications V300 Betriebsanweisung PDF herunterladen (Seite 17)

V-300 Support Notes

in the SIP messages that it sends.

Select TEL to have the V300 use the SIP number without a domain name in

the SIP messages that it sends.

Expiration

Duration

This field sets how long an entry remains registered with the SIP register

server. After this time period expires, the SIP register server deletes the

V300’s entry from the database of registered SIP numbers. The register

server can use a different time period. The V300 sends another registration

request after half of this configured time period has expired.

Re-send

Timer

Use this field to set how long the V300 waits before sending a repeat

registration request if a registration attempt fails or there is no response

from the registration server.

Session

Expires

Use this field to set the longest time that the V300 will allow a SIP session to

remain idle (without traffic) before dropping it

Min-SE

When two SIP devices negotiate a SIP session, they must negotiate a

common expiration time for idle SIP sessions. This field sets the shortest

expiration time that the V300 will accept.?

The V300 checks the session expiration values of incoming SIP INVITE

requests against the minimum session expiration value that you configure

here. If the session expiration of an incoming INVITE request is less than

the value you configure here, the V300 negotiates with the other SIP device

to increase the session expiration value to match the V300’s minimum

session expiration value.

RTP Port

Range

Real time Transport Protocol is used to handle voice data transfer. Use this

field to configure the V300’s listening port range for RTP traffic. Leave these

fields set to the defaults if you were not given a range of RTP ports to use.

DTMF Mode

The Dual Tone Multi-Frequency (DTMF) mode sets how the V300 handles

the tones that your telephone makes when you push its buttons. It is

recommended that you use the same mode that your VoIP service provider

uses.

Select RFC 2833 to send the DTMF tones in RTP packets.

Select PCM (Pulse Code Modulation) to include the DTMF tones in the

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ZyXEL Communications V300 Betriebsanweisung Seite 17