HDLC通信参数协商(SNRM/UA)

Sent frame: 7EA00020023219318717E

Comments:

7E// HDLC frame opening flag

A00A// frame type and length

0002// destination address (server) upper HDLC address 0x0001

0023// destination address (server) lower HDLC address 0x0011

21// source address (client) 0x01

93// frame type SNRM (Set Normal Response Mode)

// information field with HDLC parameters not present, defaults are proposed

1871// Frame check sequence

7E// HDLC frame closing flag