Siemens Mux_guide_v06 manual Contents

Multiplexer User's Guide

Confidential / Released

s

mobile

Contents

0	Document history			5
1	Introduction		...................................................................................................................	6
	1.1	Supported products and related documents		7
	1.2	References		7
	1.3	Term and abbreviations		8
2	Multiplexer protocol – an overview			9
	2.1	Product concept and architecture		9
	2.2	Virtual channels and AT commands		10
3	Integrating multiplexer into the customer application			11
	3.1	Characteristics		11
		3.1.1	Basic requirements	11
		3.1.2	Restrictions	11
		3.1.3	Dependencies between multiplexer channels and restrictions of use ...	12
		3.1.4	Functions without channel dependencies	12
		3.1.5	Timing conditions	13
		3.1.6	Operation of a second physical serial interface ASC1 (if applicable) ....	13
	3.2	Multiplexer control and signaling lines		14
		3.2.1	Flow control	14
		3.2.2	Escape sequence	16
	3.3	Power saving		16
	3.4	Bandwidth of logical channels		16
4	Structure of the multiplexer protocol			17
	4.1	Introduction of the multiplexer protocol		17
	4.2	Data link layer		17
		4.2.1	Flag sequence	18
		4.2.2	Address field	18
		4.2.3	Control field	19
		4.2.4	Length indicator	20
		4.2.5	Information field	20
		4.2.6	Frame checking sequence field (FCS)	20
	4.3	State diagrams		21
		4.3.1	Start-up procedure	25
		4.3.2	DLC establishment	25
		4.3.3	Information transfer	25
		4.3.4	DLC release	26
		4.3.5	Close-down procedure	26
		4.3.6	Multiplexer control channel	26
		4.3.7	Multiplexer close down (CLD)	27
		4.3.8	Test command (Test)	27
		4.3.9	Modem status command (MSC)	28
		4.3.10	Power saving control (PSC)	30
		4.3.11	Non-supported command response (NSC)	31
	4.4	Example: Establishing logical channels without parameter negotiation		32

Mux_guide_v06 Page 3 of 36 30.06.2004