Polycom IP 320 Administrator's Manual page 152

Administrator's Guide for the SoundPoint IP / SoundStation IP / VVX Family
4 - 90
dir.corp.attribute.5.type is H323_address, then the SIP protocol is
used.
• By default, the user is presented with protocol routing choices when a call
could be placed with more than one protocol from its current context. The
user must choose between SIP and H.323 to place a call by pressing the
appropriate soft key.
• Calls made using H.323 cannot be forwarded or transferred.
— The Transfer and Forward soft keys are not displayed during an
H.323 call on a Polycom VVX 1500 phone. The Forward soft key is not
displayed on the idle display of a Polycom VVX 1500 phone if the
primary line is an H.323 line.
— If a Polycom VVX 1500 user presses the Transfer soft key during an
H.323 call on a Polycom VVX 1500 phone, no action is taken.
— The auto-divert field in the local contact directory entry is ignored
when a call is placed to that contact using H.323.
— If a conference host ends a three-way conference the call and one of the
party is connected by H.323, that party is not transferred to the other
party.
Examples
The following example sip.cfg configuration file shows the relevant
parameters:
• To configure both SIP and H.323 protocols
• To set up a SIP and H.323 dial plan—Numbers with the format "0xxx" are
placed on a SIP line and numbers with the format "33xx" are placed on an
H.323 line
• To set up manual protocol routing using soft keys—If the protocol to use
to place a call cannot be determined, the Use SIP and Use H.323 soft keys
appear, and the user must select one for the call to be placed.
• To configure auto-answering on H.323 calls only
• To set the preferred protocol to SIP