Thank you for quick response and sorry for my English it could be better.

Can segments from one communiaction thread be mixed with segments from another communication (with another divice) in that case?
I don't understand how segments are assign to message when they are received not in order.
first device on local port 47808
second on local port 47809
third on local port 47810
Segments send from devices could be received not in order. Eg:

1. message1.segment1
2. message2.segment1
3. message3.segment1
4. message1.segment2
5. message2.segment2
6. message3.segment2
   Does any of that segments could be assigned to wrong message or even ommited (and corrupt whole RequestServiceAck)?

thanks
Just one more question. I'm wondering if it is possible to configure each device on different local port:
first device on local port 47808
second on local port 47809
third on local port 47810
etc... (to prevent local port number conflicts)
and send messages (each message, RequestService in one thread) to all devices simultaneously with "segmentation supported"?
Can segments from one communiaction thread be mixed with segments from another communication (with another divice) in that case?

Hi
is it possible to execute multiple services for different bacnet devices simultaneously?

execute multiple of RequestService (each one for different bacnet device) at once and then listen for answer from them?

or is it must be:

execute in sequence send RequestService to 1 device and wait for Ack and then send for another device?

Hi
is it possible to execute multiple services for different bacnet devices simultaneously?

execute multiple of RequestService (each one for different bacnet device) at once and then listen for answer from them?

or is it must be:

execute in sequence send RequestService to 1 device and wait for Ack and then send for another device?