Nortel Networks 553-3001-211 manual Commands and responses, Asynchronous Balanced Mode

Page 892 of 894 Appendix A: LAPB Data Link Control protocol

Figure 188

Balanced configuration

	Commands
Combined	Combined
station	station
	Responses
	553-3741

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 page 893.

553-3001-211 Standard 2.00 September 2004