Motorola 68P02958C00-B - Manual (Page 104)

Site Configuration
5-47
MDLC Session Logical Channels
Application layer
Application manager work space <2000-6000> [4100]:
The workspace allocated to MDLC applications (for the transmission and reception of data
frames). The end-user is not expected to modify this parameter as it is reserved for the
software engineer’s development needs. It enables the engineer to accurately determine the
memory requirements of the MDLC applications.
Stack size of application manager task <1000-20000> [10000]:
The size of the stack to be allocated for the MDLC application manager task.
Presentation Layer
Encryption/Compression buffer length <0-100> [0]:
For future use.
Transport Layer
Number of retries to declare TX FAIL <1-5> [3]:
Number of retries at session oriented logical channel level after which the Transport Layer
declares that transmission to destination site has failed.
Number of retries to declare 'Logical channel BUSY' <1-10> [5]:
When the source site sends frames to a destination site and receives a “logical channel busy”
signal (because the channels are busy transmitting data from other applications that already
accessed them), it retries as many times as determined in this parameter. After this pre-defined
number of retries, the source site declares the channel as being “busy”.
Number of transmitted frames in one burst <2-32> [4]:
Number of MDLC frames that are sent in a single burst after which the Transport Layer waits
for ACK from the destination site before it sends the next burst.
Number of entries in transmit queue <5-32> [8]:
Number of MDLC frames the Transport Layer is capable of receiving from upper layers
(Application, Presentation and Session) for transmission. When this number is reached, the
Transport Layer signals to the application to stop sending frames until it makes room for more
frames. This number should be equivalent to twice the size of a burst or more.
Number of entries in receive queue <5-32> [10]:
The number of MDLC frames the receiving site is capable of handling on their way to the
upper layers. This number should be equivalent to twice the size of a burst or more.
Number of entries in temporary queue <5-32> [6]:
The number of MDLC frames the receiving site is capable of handling on their way from the
lower layers (Data Link Reception, Network, Transmission Multiplex).