Asynchronous Balanced Mode (ABM) is a communication

Communication

Communication is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast...

 mode of HDLC and derivative protocol

Communications protocol

A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications...

s, supporting peer-oriented point-to-point communications between two nodes, where either node can initiate transmission.

For systems that work in the ABM (Asynchronous Balanced Mode), there is no master/slave relationship. Each station may initialize, supervise, recover from errors, and send frames at any time. The DTE (Data Terminal Equipment) and DCE (Data Circuit Terminating Equipment) are treated as equals. The initiator for Asynchronous Balanced Mode sends an SABM

See also

• Communication
  Communication
  Communication is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast...
  
  
• Link (telecommunications)
  Link (telecommunications)
  In telecommunications a link is the communications channel that connects two or more communicating devices. This link may be an actual physical link or it may be a logical link that uses one or more actual physical links...
  
  
• Computing
  Computing
  Computing is usually defined as the activity of using and improving computer hardware and software. It is the computer-specific part of information technology...
  
  
• Protocol
  Communications protocol
  A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications...