Polycom MGC-100 Getting Started Manual page 53

The Net-2/Net-4/Net-8 Network Interface module supports up to eight
PRI connections, depending on the card model installed in the MCU.
These connections may be either T1 or E1. For the system to recognize
the PRI lines that connect to the Network card, you must assign the
Circuit ID of the PRI line defined in Network Service to the appropriate
span in the Card Settings - Net-8 Network Parameters. Not all spans may
be currently in use. In such a case, only the spans being used are
configured.
3. To assign a Circuit ID to the appropriate span:
a. In the Span n box (where n is the span number on the Net-2/Net-4/
Net-8 module to which the PRI line is connected), clear the Null
Configuration check box to enable the span.
b. In the Circuit ID box, enter the circuit ID as defined in the ISDN
Network Service-Span and Phones dialog box. According to the
selected Circuit ID, the ISDN Network Service is assigned to the
network card. Each span can be assigned a different Network
Service.
c. Click Apply.
The name of the network service appears in the Service Name box.
4. Click OK.
To configure a Net-2/Net-4/Net-8 span as primary or backup clock:
Any of the configured spans can be set as the "Master Clock," that
synchronizes the system clock to the network clock, or "backup clock", that is
used if the master clock fails.
For more information about clocking, see the MGC Administrator's Guide,
Chapter 5.
1. In the Browser pane, expand the Net-2/Net-4/Net-8 ISDN card to display
its units in the Browser and Status panes. Each unit represents a span in
the ISDN Network card.
Chapter 3 - Initial System Configuration
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