4600 Series IP Telephones
Issue 6 February 2007 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 Server
on page 37 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 Telephones on 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 Documents
on
page 18.
Time-to-Service (TTS)
The IP Endpoint Time-to-Service (TTS) feature introduced in the R2.8 software release, along
with the Communication Manager 4.0 release, changes the way IP endpoints register with their
gatekeeper, reducing the time to come into service. Currently, IP endpoints are brought into
service in two steps, which are coupled (1) H.323 registration and (2) TCP socket establishment
for call signaling. The TTS feature de-couples these steps. In CM 4.0, IP endpoints can be
enabled for service with just the registration step. TCP sockets are established later, as needed.
The TTS feature also changes the direction of socket establishment. With TTS, Communication
Manager, rather than the endpoint, initiates socket establishment, which further improves
performance.
In CM 4.0, TTS is enabled by default, but can be disabled for all IP endpoints in a given IP
network regions by changing the IP Network form. TTS applies only to IP endpoints whose
firmware has been updated to support this feature. It does not apply to the following endpoints:
third party H.323, SIP, DCP, BRI, and analog. Please refer to Administrator Guide for Avaya
Communications Manager, # 03-300509 for further information.
