Polycom MGC Administrator, Administrator'S Manual

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MGC Administrator’s Guide
3-101
When the MCU acts as a DCE it is able to communicate directly with an
endpoint over a serial connection, by dialing the endpoint’s number or using a
dedicated line. The DCE can also connect to an ISDN endpoint. It does so by
dialing the endpoint’s number. This number is transferred over a serial
connection to another DCE. The DCE then translates the number to the
appropriate ISDN switch where it may be routed to an ISDN endpoint.
Figure 3-2: Typical Configuration With Serial Connection - MCU as DCE
The MPI (Multi Protocol Interface) box together with the MPI-8 Network
interface card installed in the MGC unit provide the interface from the MGC
unit to the serial components in the network.
ISDN Network
MCU
(DCE)
DCE
Endpoint (ISDN)
Endpoint
Serial
connection
T1/E1
Endpoint Endpoint
Serial
connection