Polycom MGC Administrator, Administrator'S Manual

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Chapter 3 - Defining Network Services
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9. Define the following parameters:
Table 3-34: ATM Settings Dialog Box Options
Field Description
ATM Service
Name Enter the Network Service name using up to 20
characters. The ATM Service Name identifies the
service to the system.
Service Type Select the network transfer rate from the drop-down
list according to the ATM Network Interface module
installed in your system. There are two
network
transfer rates currently available for ATM networks:
ATM-25 (which is the default) – for a transfer rate of
25 Mbps, and ATM-155 – for a transfer rate of 155
Mbps.
MVIP Interrupt
Rate An internal parameter used by the VC-NIC. By
default, the MVIP Interrupt Rate is set to 4
milliseconds. This value can be modified to 8
milliseconds, but should only be changed with the
authority of a support engineer.
Quality of Service CBR – Constant Bit Rate. Used for real time
applications like voice and audio.
VBR-RT – Variable Bit Rate – Real Time. Similar to
CBR. This service allows statistical multiplexing and
consistent service quality to applications such as
compressed voice and audio.
VBR-NRT – Variable Bit Rate – Non-Real Time. This
service is defined for non-real time applications
whose data transfer is performed in random bursts.
Peak Cell Rate The maximum cell rate at which a source may send
its cells during the connection lifetime.
Switch Type There are two types of switches that can be used
depending on the default Quality of Service settings.
Others – Set this switch type when the default Quality
of Service settings is VBR-RT .
FORE Switches – Set this switch type when working
with FORE Swithes and the default Quality of Service
settings is
VBR-NRT .