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SpectraLink 8020/8030 Wireless Telephone: Administration Guide for SIP
14 PN: 1725-36038-001_B.doc
Ethernet switch
Interconnects multiple network devices, including the SpectraLink
8000 SVP Server, the proxy server(s), wired IP phones and the APs.
Ethernet switches provide the highest performance networks, which
can handle combined voice and data traffic, and are required when
using the SpectraLink 8020/8030 Wireless Telephones.
Although a single Ethernet switch network is recommended, the
handsets and the SpectraLink 8000 SVP Server can operate in larger,
more complex networks, including networks with multiple Ethernet
switches, routers, VLANs and/or multiple subnets. However, in such
networks, it is possible for the quality of service (QoS) features of the
SpectraLink 8000 SVP Server to be compromised and voice quality
may suffer. Any network that consists of more than a single Ethernet
switch should be thoroughly tested to ensure any quality issues are
detected.
Note that the SpectraLink 8020/8030 Wireless Telephones cannot
“roam” from one subnet to another. If routers and multiple subnets
are in use, the handsets must only use APs attached to a single subnet,
or be powered off and back on to switch to a different subnet.
SIP server
The SIP server is a component from a third-party vendor that
provides access to telephony services. The handsets can recognize up
to three distinct SIP servers in a single system.
The handsets can operate with SIP proxy servers such as SER (SIP
Extensible Router) or with SIP Back-to-Back User Agents (B2BUA) –
the most common form of SIP server for PBX-based systems. The
handsets can also operate with no SIP server at all. In this case the IP
address location services provided by the SIP server are not available,
so direct IP address dialing must be used.
The SIP proxy server connects to another device such as a PBX or
gateway and from there, other wired phones and the PSTN.
SIP phone
The optional wired-LAN desksets such as those provided by Cisco,
Inter-Tel, and Polycom.