Polycom MGC Administrator, Руководство администратора

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Chapter 3 - Defining Network Services
3-2
ISDN Network Service
The Net-2/4/8 Network card installed in the MCU interfaces between the
MGC unit and the ISDN switch. The Network Service is used to define the
properties of the switch and the ISDN lines running from the switch to the
ISDN Network card. Each group of ISDN lines having the same
characteristics and originating from the same ISDN switch, will be assigned
to the same Network Service. The ISDN Network Service is also used for
connections via PSTN, leased lines and NFAS configuration of ISDN lines.
T1–CAS Network Service
The Net-2/4/8 Network card installed in the MCU interfaces between the
MGC unit and T1–CAS lines. The T1–CAS Network Service is used to
define the properties of the switch and the T1–CAS lines running from the
switch to the Net-2/4/8 Network card.
IP (H.323 and SIP) Network Service
The IP Network Service defines the properties of the IP network and the IP
cards (installed in the MCU) used for connecting IP (H.323 and SIP)
endpoints to the conference. Several of the network components are used by
both H.323 and SIP endpoints to connect to the conference, and the same IP
card is used for H.323 and SIP connections.
ATM Network Service
The ATM Network card installed in the MCU interfaces between the MGC
unit and the ATM Network (FVC), usually via a UNI address router (V-Gate).
The Network Service is used to define the properties of the ATM switch and
the V-Gate to which the MGC unit is connected.
MPI Serial Network Service
The MGC unit may be connected to endpoints over a serial connection using
the V.35, RS-449 and RS-530 serial standards. The MPI-8 Network Interface
module together with the MPI box interfaces between the serial equipment
and the MGC unit. The MPI Network Service is used to define the properties
of the serial connections between the MGC unit and the data communication
equipment.