Polycom MGC Administrator, Руководство администратора

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MGC Administrator’s Guide
3-5
7. Click Next .
The PRI Settings dialog box opens.
Span Type Spans are ISDN lines supplied by the service
provider to the MCU. You can define each span as a
separate Network Service, or you can define all the
spans from the same carrier under the same
Network Service.
Select the span type from the drop-down list; select
either
T1 (usually in the U.S., has 23 B ch 1
D channel), or E1 (usually in Europe, has 30 B
ch 1 D channel).
The MCU may contain several network cards. A
Net-E1/Net-T1 card may be connected to two
spans; both spans must be of the same span type.
A Net-2/4/8 card may be connected to 2, 4 or 8
spans respectively with both spans types connected
to it.
Service Type Select the service type from the drop-down list. The
following options are available:
•
PRI (Primary Rate Interface) - default selection
for all ISDN lines that are not leased lines
•
Leased-24 - leased line applicable to T1 lines
• Leased-30 or Leased-31 - leased line applicable
to E1 lines.
For a detailed description of the ISDN Leased lines
Network Service definition, see “Defining ISDN
Leased Lines” on page 3-19.
NFAS ( Non-Facility
Associated
Signaling)
Select the NFAS check box to define a network
service using ISDN-NFAS lines. For more
information on this option, see “Defining ISDN
Non-Facility Associated Signaling (NFAS)” on
page 3-24.
Table 3-1: Settings Dialog Box Options
Field Description