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3028 Turbo Statistical Multiplexer
I-4
154001UA
PERFORMANCE
PERFORMANCE
PERFORMANCE
PERFORMANCE
PERFORMANCE
GUIDELINES
GUIDELINES
GUIDELINES
GUIDELINES
GUIDELINES
While the multiplexer will support all eight channels of SDLC/HDLC data or any
combination of ASYNC and SDLC/HDLC channels, you must keep in mind that
SDLC/HDLC is inherently traffic dependent.
Therefore, you should consider the following guidelines:
1. No SDLC/HDLC channel speed should be greater than the link speed.
2. The aggregate SDLC/HDLC input rate should not be greater than double
the link speed.
Example: 4 channels at 9.6K bps may be run with a 19.2K bps link.
EXCEPTIONS
EXCEPTIONS
EXCEPTIONS
EXCEPTIONS
EXCEPTIONS
The functions of the LCD display and terminal interface as described in the
COMMAND MODE section in Chapter 2 remain valid for SDLC/HDLC except for
the following:
CHANNEL PARAMETERS
CHANNEL STATISTICS
CHANNEL STATUS
One important feature added with SDLC/HDLC is that any SDLC/HDLC channel
is given preference over any asynchronous channels when contending for link
bandwidth. SDLC/HDLC channels are further prioritized, from low to high, by
channel number (Channel 1 has a higher priority than Channel 2, etc.).
Note
SDLC/HDLC channels may not be used to
access supervisory functions.
The 3028 supervisory functions are available from
the front panel or a standard asynchronous
terminal only.
SDLC/HDLC channels may be configured via an
asynchronous terminal interface.
MULTIPLEXER
MULTIPLEXER
MULTIPLEXER
MULTIPLEXER
MULTIPLEXER
CONFIGURA
CONFIGURA
CONFIGURA
CONFIGURA
CONFIGURATION
TION
TION
TION
TION
The Command mode allows you to configure the multiplexer for operation using
either the multiplexer front panel or an attached asynchronous terminal.
The following sequence of option configuration is used to set up the SDLC/HDLC
channels:
CHANNEL n TYPE
Set the channel to SDLC/HDLC, which makes the following eight options
available for configuration.
CHANNEL n CLOCK SOURCE
Set the channel clock source,
INTERNAL
,
EXTERNAL
or
INT/EXT
.