Polycom Version 1.4.x 17 - Manual (Page 137)

Administrator Guide - SoundPoint ® IP / SoundStation ® IP Optimization
Copyright © 2004 Polycom, Inc. 129
4.6.3.5.1 Message Waiting Indicator
In the following table, x is the registration number. IP 300: x=1-2; IP 500: x=1-3; IP
600: x=1-6; IP 4000: x=1.
4.6.3.6 Network Address Translation
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.
Attribute Permitted Values Default Interpretation
msg.mwi.x.sub-
scribe ASCII encoded string con-
taining digits (the user part
of a SIP URL) or a string
that constitutes a valid SIP
URL (6416 or 6416@poly-
com.com) Null If non-Null, the phone will
send a SUBSCRIBE
request to this contact after
boot-up.
msg.mwi.x.call-
BackMode contact or
registration or
disabled
“registration”
for x = 1,
“disabled” for
others
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 con-
tact registered (the phone
will call itself).
If set to “disabled”, mes-
sage retrieval is disabled.
msg.mwi.x.callBack ASCII encoded string con-
taining digits (the user part
of a SIP URL) or a string
that constitutes a valid SIP
URL (6416 or 6416@poly-
com.com) Null Contact to call when
retrieving messages for this
registration.
Attribute
Permitted
Values
Default Interpretation
nat.ip dotted-deci-
mal IP
address Null IP address to advertise within SIP signaling -
should match the external IP address used by
the NAT device.