4600 Series IP Telephones
Issue 4 August 2006 35
A minimum of two DHCP servers are recommended for reliability. Avaya strongly
recommends that a DHCP server be available at remote sites if WAN failures isolate IP
telephones from the central site DHCP server(s).
The file server provides the 4600 Series IP Telephone with a script file and, if appropriate, new
or updated application software. See Step 3: Telephone and File Serveron page 36 under
Initialization Process. In addition, you can edit an associated settings file to customize
telephone parameters for your specific environment. See Administering Options for the 4600
Series IP Telephoneson page 100.
H.323 Registration and Authentication
The Avaya Media Server supports using the extension and password to register and
authenticate 4600 Series IP Telephones. For further information, see Related Documentson
page 18.
SIPRegistration and Authentication
A 4600 Series SIP IP Telephone requires an off-PBX station (OPS) extension on the Avaya
Communication Manager and a login and password on the Registration Server to register and
authenticate it. Registration is described in the Initialization process, in Step 4: Telephone and
the Call Server on page37. For further information, see the Converged Communication Server
Release 3.0 Installation and Administration Guide (555-245-705), available on the Avaya
support Web site, http://www.avaya.com/support.
WAN ConsiderationsQoS is harder on a WAN than a LAN. A LAN assumes no bandwidth concerns. A WAN
assumes a finite amount of bandwidth. Therefore, QoS considerations are more significant
when the IP telephony environment includes a WAN. In addition, there are administrative and
hardware compatibility issues unique to WANs. WAN administration is beyond the scope of this
document.