Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

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Appendix A: LAPB Data Link Control protocol
Asynchronous Balanced Mode 
Asynchronous Balanced Mode (ABM) is a balanced, configured operational 
mode in which either combined station may send commands at any time and 
may initiate certain response frame transmissions without receiving 
permission from the other combined station.
Commands and responses
The elements of procedure are described in terms of actions which take place 
when a command is received. The classes of procedures are a combination of 
the frame structure and the set of elements that satisfy the requirements of a 
specific application. The LAPB Balanced Asynchronous Class of Procedure 
(BAC, 2, 8) is implemented. This is compatible with both BX.25 and ADCCP 
specifications. The basic set of commands and responses is listed in 
Table 276 on 
Figure 188
Balanced configuration
Commands
Combined
station
Combined
station
Responses
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