Rules for establishing connections

• A connection is actively established by a station. The partner station then has to passively establish the connection.
• The way in which the connection is established is linked to the job type on the S5 side.
  SEND = Establish the connection actively
  RECEIVE = Establish the connection passively
• If there are two jobs being used on one connection ("Number of jobs : 1 of 2"), the way in which the connection is established (active or passive) is determined by the first job. In our example, the first job is "SEND", which means that the connection is actively established by the S5.
• The way in which the connection is established has no influence on the jobs.

TSAP rules

• The TSAP should always be 8 characters long.
• Permitted characters for TSAPs are letters, numbers, dashes and underscores.
• Only use upper-case lettering.
• The local and remote TSAPs may be identical.
• The TSAPs must be unique for each connection.
• Use hexadecimal format versions of character strings to check the TSAPs.

I hope this helps