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Table 37 VOICE > Service Configuration > SIP Settings > Show Advanced Setup
LABEL
Register
Expiration
Duration
Register Re-
send Timer
Session Expires
(SE)
Min-SE
RTP Port Range
Start Port
End Port
Voice Compression
Primary,
Secondary, and
Third
Compression
MAX-207HW2R User's Guide
DESCRIPTION
Enter the number of seconds your SIP account is registered with the
SIP register server before it is deleted. The MAX-207HW2R
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.)
Enter the number of seconds the MAX-207HW2R waits before it tries
again to register the SIP account, if the first try failed or if there is no
response.
Enter the number of seconds the conversation can last before the call is
automatically disconnected. Usually, when one-half of this time has
passed, the MAX-207HW2R or the other party updates this timer to
prevent this from happening.
Enter the minimum number of seconds the MAX-207HW2R accepts for a
session expiration time when it receives a request to start a SIP
session. If the request has a shorter time, the MAX-207HW2R rejects it.
Enter the listening port number(s) for RTP traffic, if your VoIP service
provider gave you this information. Otherwise, keep the default values.
To enter one port number, enter the port number in the Start Port and
End Port fields.
To enter a range of ports:
•
Type the port number at the beginning of the range in the Start
Port field
•
Type the port number at the end of the range in the End Port field.
Select the type of voice coder/decoder (codec) that you want the MAX-
207HW2R to use.
G.711 provides high voice quality but requires more bandwidth (64
kbps).
•
G.729 requires only 8 kbps.
•
G.711A is typically used in Europe.
•
G.711u is typically used in North America and Japan.
•
G.723 provides good voice quality, and requires 20 or 40 kbps.
The MAX-207HW2R must use the same codec as the peer. When two
SIP devices start a SIP session, they must agree on a codec.
For more on voice compression, see
DTMF Mode controls how the MAX-207HW2R handles the tones that
your telephone makes when you push its buttons. You should use the
same mode your VoIP service provider uses.
•
RFC 2833 - send the DTMF tones in RTP packets.
•
PCM - 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)
can distort the tones.
•
SIP INFO - send the DTMF tones in SIP messages.
Chapter 10 The Service Configuration Screens
Voice Coding
on
page 100
103
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