M20 User manual - search read.pudn.com

“41 54 2D 43 6F 6D 6D 61 6E 64 20 49 6E 74 6572 70 72 65 74 65 72 20 72 65 61 64 79 0D 0A” is the string “AT-Command Interpreter ready..” to note the TE. This field is quiet different form UIH control frame, user should take care about this. 7E 01 FF E3 05 07 0D B6 7E UIH control frame to DLC 1 with modem status message (retransmit) ................
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