User guide

Chapter 4 – Configuring Your MultiVOIP
MultiVOIP® Voice/Fax over IP Gateways 37
Ethernet/IP Parameter Definitions (continued)
Field Name
Values
Description
Diff Serv
Parameter
fields
Diff Serv PHB (Per Hop Behavior) values pertain to a differential prioritizing system for IP packets as handled by
Diff Serv-compatible routers. There are 64 values, each with an elaborate technical description. These
descriptions are found in TCP/IP standards RFC2474, RFC2597, and, for present purposes, in RFC3246, which
describes the value 34 (34 decimal; 22 hex) for Assured Forwarding behavior (default for Call Control PHB) and
the value 46 (46 decimal; 2E hexadecimal) for Expedited Forwarding behavior (default for VOIP Media PHB).
Before using values other than these default values of 34 and 46, consult these standards documents and/or a
qualified IP telecommunications engineer.
To disable Diff Serv, configure both fields to 0 decimal.
Call Control PHB
0 – 63
default = 34
Value is used to prioritize call setup IP packets.
Setting this parameter to 0, along with VOIP Media PHB below disables Diff Serv.
VOIP Media PHB
0 – 63
default = 46
Value is used to prioritize the RTP/RTCP audio IP packets.
Setting this parameter to 0, along with Call Control PHB above disables Diff Serv.
FTP Parameter fields
FTP Server
Enable
Y/N
Default =
disabled
See “FTP Server
File Transfers”
in Chapter 6
MultiVOIP unit has an FTP Server function so that firmware and other important operating
software files can be transferred to the VOIP via the network.
DNS Parameter fields
Enable DNS
Y/N
Default =
disabled
Enables Domain Name Space/System function where computer names are resolved using a
worldwide distributed database.
Enable SRV
Y/N
Enables ‘service record’ function. Service record is a category of data in the Internet Domain
Name System specifying information on available servers for a specific protocol and domain,
as defined in RFC 2782. Newer internet protocols like SIP, STUN, H.323, POP3, and XMPP
may require SRV support from clients. Client implementations of older protocols, like LDAP
and SMTP, may have been enhanced in some settings to support SRV.
DNS Server IP
Address
n.n.n.n
IP address of specific DNS server to be used to resolve Internet computer names.