SpectraLink h340 - Manual (Page 9)

SpectraLink Corporation Configuration and Administration—NetLink e340/h340/i640 Wireless Telephone
with SIP
PN: 72-1089-02-D.doc Page 9
Note that the NetLink e340/h340/i640 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.
TFTP server
Required in the system to distribute software to the handsets. May be on a different
subnet than the gateway, APs and/or handsets.
SIP TFTP server
Required in the system to deliver SIP configuration parameters to the SIP handset
whenever a SIP handset is powered-up. The location of the SIP TFTP server is
separately specified in SIP handset administration parameters (See Section 4.1 The
Admin Menu.) Normally, the SIP TFTP server is the same as the network TFTP
server, see above.