9. The Menu
135
Secondary DNS Server.
This is the IP address for the alternative server that provides address
resolution (DN to IP address) for the phone.
NTP Server.
This is the IP address for the server that provides date and time information for the
phone. If you leave this field blank, or if your DHCP server does not provide an address for the
SNTP server, the ZIP4x4 uses the address of the SIP Outbound Proxy to access the SNTP server.
TFTP Server.
This is the IP address for the file server that provides configuration information for
the phone.
The TFTP server should contain a configuration file that provides the following information:
1
•
address of the SIP outbound proxy server (you can specify this as an FQDN or an IP address)
•
address of the SIP registrar server (you can specify this as an FQDN or an IP address)
•
address of the voice mail server (you can specify this as an FQDN or an IP address)
•
RTP start port
•
SIP receive port
•
SIP transmit port
•
SIP transport protocol
If you use the ZIP4x4 with the a system that does not creates the configuration file with all these
parameters, you must configure these parameters manually.
DSCP.
The final setting in this menu structure is the DSCP (layer 3 QoS) setting.
2
The phone
displays:
PSettings | IP
Secondary DNS server
}10.1.10.10
PSettings | IP
NTP server
}10.1.10.194
PSettings | IP
TFTP server
}10.1.10.20
1. For more information about how the phone uses the TFTP server, see section 5.1 on page 35.
2. RFC 2597 and RFC 2598 define the various code points and per-hop behavior (PHBs). RFC 2474 and RFC 2475 define
differentiated services.
Phone port DSCP
}0
(0~63. VoIP 46)
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