Zultys ZIP2, User Manual

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ZIP2 User’s Manual
B.4.4.1 Recommended Parameter Settings
All SIP Extensions information parameters are optional. It is, however, highly recommended that
the configuration files explicitly define the settings for these variables.
SIP_MESSAGE_WAITING: This parameter enables the sending of SIP subscriptions and
acceptance of SIP Voice mail notifications from servers compliant with draft-ietf-sipping-mwi-01.
When set to ‘YES’, compliant SIP servers send a notification to the phone and trigger a blinking
message waiting light on receipt of voice mail.
SIP_REXMT_INVITE and SIP_REXMT_REQUEST: In concert with the BACKUP_SERVERIP
parameter, these parameters can be used to guarantee dial tone on loss of connectivity to a remote
central SIP Server. Setting a low number of retransmits for SIP requests transparently fails over to
the local SIP Backup gateway in the event the WAN or other connection to the main server goes
down.
STUN_SERVER: STUN permits users behind firewalls and NATs to tunnel SIP and RTP traffic
transparently.
B.4.4.2 Sample Configuration File
Figure B-9 displays the SIP Extension settings section from a sample configuration file.
STUN_PORT Specifies the Port number for the STUN
server. Valid settings range from 1025 to
65535.
Default value is 3728
3.38
STUN_SERVER Specifies the IP address or FQDN of the
STUN server for SIP/RTP NAT Traversal.
Phone will automatically check for this on
boot up using DNS SRV if field is empty.
Default value is empty
3.38
Parameter Description
Equivalent
web interface
parameter
Version
Introduced
Figure B-8 SIP Extension Configuration Parameters (Continued)