Ethernet requirements
The following items describe the Ethernet requirements.
• The IP
network must offer a Quality of Service (QoS) that is sufficient to support the SIP
DECT Voice over IP.
• The IP network must support transparent IP multicast between all DAPs and the DAP
controller.
• Connect only one DAP to one IP Switch port.
• DAP supports full duplex and supports autonegotiation if DAP is connected to a port on
an Ethernet Switch.
Important:
Configure the Ethernet switch ports to which the DAPs are connected to use
autonegotiation. If the switch does not support autonegotiation, you can use full-duplex;
however SIP DECT can operate incorrectly on some switches when you configure them
to use full-duplex.
• Ensure that enough unique IP addresses are available to support both data networking
traffic and SIP DECT components. You can configure private IP addresses for local traffic,
and you can configure private IP addresses on the local network to connect to public IP
addresses if you use Network Address Translation (NAT). However, SIP DECT does not
support NAT.
• Ensure that IP addresses and routing are consistent with each other to deliver the required
transparency. Also ensure that IP addresses are consistent with routing for normal unicast
traffic as well as for the required multicast traffic.
• The maximum cable length between the DAP and IP network equipment, such as a
switch, is 100 meters for a Category 5, unshielded twisted-pair, half-duplex cable. If the
required cable length between the IP network equipment and the DAP exceeds 100
meters, use Long Range Ethernet equipment in the connection. Several manufacturers
offer such a solution, which allows cable lengths of more than one kilometer (km).
Fixed IP network addresses
Y
ou must provision fixed IP addresses for the following servers:
• The TFTP server stores the configuration file and the firmware that are available to the
DAPs. After a DAP starts up, the DHCP server sends the DAP the IP address of the TFTP
Site planning and hardware deployment
24 SIP DECT Fundamentals October 2012
Comments? infodev@avaya.com
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