Network Address Translation <Nat - Polycom SIP 3.1 Administrator's Manual

Sip 3.1
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Administrator's Guide SoundPoint IP / SoundStation IP
Attribute
msg.mwi.x.subscribe
msg.mwi.x.
callBackMode
msg.mwi.x.callBack
Network Address Translation <nat/>
A - 120
Message Waiting Indicator <mwi/>
In the following table, x is the registration number. IP 301, 320, 330, 430: x=1-2;
IP 501: x=1-3; IP 550, 560: x=1-4; IP 600: x=1-6; IP 601: x=1-12;
IP 650, 670: x=1-34; IP 4000: x=1; IP 6000: x=1; IP 7000: x=1.
This configuration attribute is defined as follows:
Permitted Values
ASCII encoded string containing
digits (the user part of a SIP
URL) or a string that constitutes
a valid SIP URL (6416 or
6416@polycom.com)
contact or
registration or
disabled
ASCII encoded string containing
digits (the user part of a SIP
URL) or a string that constitutes
a valid SIP URL (6416 or
6416@polycom.com)
These parameters define port and IP address changes used in NAT traversal.
The port changes will change the port used by the phone, while the IP entry
simply changes the IP advertised in the SIP signaling. This allows the use of
simple NAT devices that can redirect traffic, but do not allow for port
mapping. For example, port 5432 on the NAT device can be sent to port 5432
on an internal device, but not port 1234.
Default
Interpretation
Null
If non-Null, the phone will send
a SUBSCRIBE request to this
contact after boot-up.
"registration"
Configures message retrieval
and notification for the line.
If set to "contact", a call will be
placed to the contact specified
in the callback attribute when
the user invokes message
retrieval.
If set to "registration", a call will
be placed using this registration
to the contact registered (the
phone will call itself).
If set to "disabled", message
retrieval and message
notification are disabled.
Null
Contact to call when retrieving
messages for this registration.

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