Polycom MGC Administrator, Руководство администратора

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MGC Administrator’s Guide
3-89
d. (Optional) Define the following fields.
Table 3-27: Fixed Ports & NAT Dialog Box Options
Field Description
Enable Fixed Ports
Enable Fixed Ports Select this check box to enable the configuration of
firewall ports used for softening, control and media
and definition of the number of concurrent calls in the
IP network service. If you are defining a service for
local calls that do not require configuring the firewall
to accept calls from external entities, leave this check
box clear.
Number of calls Enter the Number of Calls based on the predicted
number of simultaneous incoming video calls that
require fixed port allocation and are handled by the
network and MCU, up to the maximum that can be
handled by the IP card (dependent on card type).
If you exceed the maximum number of calls
configured for the card an error message appears
listing the call range that can be entered.
Port Range
Definitions The following general instructions apply to the
Signaling , Control , Audio , Video , data and FECC
fields. Individual field definitions follow the general
instructions.
Define the port ranges for each of the channels; enter
the first port for each channel and the system
automatically fills in the end of the assigned port
range. The IANA recommended port range is 49152
to 65535.
The network administrator configures the server and
allocates firewall ports based on network
requirements. In case of a firewall, the network
administrator calculates the number of ports that
should be allocated to video calls according to the
number of ports required for each media channel (13
in total) and the volume of incoming traffic via the
firewall (the number of simultaneous calls).