Mitel Inter-Tel 5000, Installation And Maintenance Manual

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Chapter 4: Specifications
Motherboard elements
Inter-Tel
®
5000 Installation Manual – Issue 2.4, May 2008
Page 4-19
Motherboard elements
Circuitry and components on the Base Server motherboard provide elements that are essential
to the performance of the Inter-Tel 5000 platform, including:
•
System/real-time clock : Provides accurate date and time for the system.
•
Built-in Network Clock Circuitry (NCC) : The network clock circuitry provides the time
division multiplex (TDM) clock for the entire system. This circuitry is necessary specifically
when digital trunks (e.g., T1, T1/PRI, E1/PRI, BRI) are connected to the system. This
circuitry allows the system to synchronize the system TDM clock to the outside world
(telco) and provide a smooth, error-free clock transition when switching clock reference
from one digital trunk to another.
•
Conferencing resources : Supports up to 20 circuits in multiple voice conferences. The
system allows up to five simultaneous four-party conferences or up to six simultaneous
three-party conferences at a time. However, conferencing is
not amplified.
•
DTMF receivers : Provides six resources that convert DTMF signals to digital codes for
use by the system. Used by the system when single line endpoints are dialing, when
features such as DISA and analog voice mail are being used, and to receive Dialed
Number Identification Service (DNIS) and/or Automatic Number Identification (ANI) digits
for incoming T1 Ear-and-Mouth/2-way (E&M) calls. DTMF receivers are in use only while
the dialed number is being processed, not for the duration of the call. If all DTMF receivers
are busy, the user may try again. DISA users are redirected to the primary attendant.
•
DTMF transmitters : Provides four resources for generating DTMF tones whenever
needed by the system. For example, when a user manually dials a number while on a call
or when a endpoint user uses one of the system auto-dial features (ARS, Call Forward to
the public network, Station or System Speed Dial, etc.).
•
Tone generating circuit : Produces all of the system tones (busy, reorder, Do-Not-Disturb,
etc.) heard by endpoints, DISA, and automated attendant users.
•
Internal Modem : Provides a dial-in modem that is accessible through Point-to-Point
Protocol (PPP) and capable of transferring data at speeds up to 33,600 bps. This modem
is always equipped and functions effectively as a system serial port over IP that the user
must “call.” Because the connection is established with a call, each modem application in
a system is assigned an extension. The default extension is 1500. For details about the
modem, refer to the
Inter-Tel 5000 Features and Programming Guide (part no. 580.8006).