Sierra Wireless AC595 Instruction Manual

2130634
Rev 1.9

Mini Card / AirCard / Compass
USB Driver Developer’s Guide
Refers to:
AC595 / AC595U / AC597 / AC597E
AC875 / AC875U
AC880 / AC880E / AC880U
AC881 / AC881U
C597
C885 / C888
MC5725 / MC5725V / MC5727
MC8775 / MC8775V
MC8780 / MC8781 / MC8785V
MC8790 / MC8790V
MC8791V
MC8792V

Preface
Rev 1.9 Sep.08 Proprietary and Confidential 3
Important Notice Duetothenatureofwirelesscommunications,transmission
andreceptionofdatacanneverbeguaranteed.Datamaybe
delayed,corrupted(i.e.,haveerrors)orbetotallylost.
Althoughsignificantdelaysorlossesofdataarerarewhen
wirelessdevicessuchastheSierraWirelessmodemareusedin
anormalmannerwithawell‐constructednetwork,theSierra
Wirelessmodemshouldnotbeusedinsituationswherefailure
totransmitorreceivedatacouldresultindamageofanykind
totheuseroranyotherparty,includingbutnotlimitedto
personalinjury,death,orlossofproperty.SierraWireless
acceptsnoresponsibilityfordamagesofanykindresulting
fromdelaysorerrorsindatatransmittedorreceivedusingthe
SierraWirelessmodem,orforfailureoftheSierraWireless
modemtotransmitorreceivesuchdata.
Safety and Hazards DonotoperatetheSierraWirelessmodeminareaswhere
blastingisinprogress,whereexplosiveatmospheresmaybe
present,nearmedicalequipment,nearlifesupportequipment,
oranyequipmentwhichmaybesusceptibletoanyformof
radiointerference.Insuchareas,theSierraWirelessmodem
MUSTBEPOWEREDOFF.TheSierraWirelessmodemcan
transmitsignalsthatcouldinterferewiththisequipment.
DonotoperatetheSierraWirelessmodeminanyaircraft,
whethertheaircraftisonthegroundorinflight.Inaircraft,the
SierraWirelessmodemMUSTBEPOWEREDOFF.When
operating,theSierraWirelessmodemcantransmitsignalsthat
couldinterferewithvariousonboardsystems.
Note: Some airlines may permit the use of cellular phones while the
aircraft is on the ground and the door is open. Sierra Wireless
modems may be used at this time.
Thedriveroroperatorofanyvehicleshouldnotoperatethe
SierraWirelessmodemwhileincontrolofavehicle.Doingso
willdetractfromthedriveroroperatorʹscontrolandoperation
ofthatvehicle.Insomestatesandprovinces,operatingsuch
communicationsdeviceswhileincontrolofavehicleisan
offence.
Limitation of
Liability
Theinformationinthismanualissubjecttochangewithout
noticeanddoesnotrepresentacommitmentonthepartof
SierraWireless.SIERRAWIRELESSANDITSAFFILIATES
SPECIFICALLYDISCLAIMLIABILITYFORANYANDALL
DIRECT,INDIRECT,SPECIAL,GENERAL,INCIDENTAL,
CONSEQUENTIAL,PUNITIVEOREXEMPLARYDAMAGES
INCLUDING,BUTNOTLIMITEDTO,LOSSOFPROFITSOR

Mini Card / AirCard / Compass USB Driver Developer’s Guide
4 Proprietary and Confidential 2130634
REVENUEORANTICIPATEDPROFITSORREVENUE
ARISINGOUTOFTHEUSEORINABILITYTOUSEANY
SIERRAWIRELESSPRODUCT,EVENIFSIERRAWIRELESS
AND/ORITSAFFILIATESHASBEENADVISEDOFTHE
POSSIBILITYOFSUCHDAMAGESORTHEYARE
FORESEEABLEORFORCLAIMSBYANYTHIRDPARTY.
Notwithstandingtheforegoing,innoeventshallSierra
Wirelessand/oritsaffiliatesaggregateliabilityarisingunderor
inconnectionwiththeSierraWirelessproduct,regardlessof
thenumberofevents,occurrences,orclaimsgivingriseto
liability,beinexcessofthepricepaidbythepurchaserforthe
SierraWirelessproduct.
Patents Portionsofthisproductmaybecoveredbysomeorallofthe
followingUSpatents:
5,515,013 5,629,960 5,845,216 5,847,553 5,878,234
5,890,057 5,929,815 6,169,884 6,191,741 6,199,168
6,339,405 6,359,591 6,400,336 6,516,204 6,561,851
6,643,501 6,653,979 6,697,030 6,785,830 6,845,249
6,847,830 6,876,697 6,879,585 6,886,049 6,968,171
6,985,757 7,023,878 7,053,843 7,106,569 7,145,267
7,200,512 7,287,162 7,295,171 D442,170 D459,303
D559,256 D560,911
andotherpatentspending.
Thisproductincludes
technologylicensedfrom:
LicensedbyQUALCOMMIncorporatedunderoneormoreof
thefollowingUnitedStatespatentsand/ortheircounterparts
inothernations:
4,901,307 5,056,109 5,101,501 5,109,390 5,228,054
5,267,261 5,267,262 5,337,338 5,414,796 5,416,797
5,490,165 5,504,773 5,506,865 5,511,073 5,535,239
5,544,196 5,568,483 5,600,754 5,657,420 5,659,569
5,710,784 5,778,338
ManufacturedorsoldbySierraWirelessoritslicenseesunder
oneormorepatentslicensedfromInterDigitalGroup.
Copyright ©2008SierraWireless.Allrightsreserved.
Trademarks AirCard®and“HeartoftheWirelessMachine®”areregistered
trademarksofSierraWireless.Watcher®isatrademarkof
SierraWireless,registeredintheEuropeanCommunity.
SierraWireless,theSierraWirelesslogo,theredwavedesign,
andthered‐tippedantennaaretrademarksofSierraWireless.
QUALCOMM
®
3G

Preface
Rev 1.9 Sep.08 Proprietary and Confidential 5
Windows®isaregisteredtrademarkofMicrosoftCorporation.
QUALCOMM®isaregisteredtrademarkofQUALCOMM
Incorporated.Usedunderlicense.
Othertrademarksarethepropertyoftherespectiveowners.
Contact
Information
Consultourwebsiteforup‐to‐dateproductdescriptions,
documentation,applicationnotes,firmwareupgrades,trouble‐
shootingtips,andpressreleases:
www.sierrawireless.com
Revision History
Sales Desk: Phone: [phone]
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail: [email protected]
Post: Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax: [phone]
Web: www.sierrawireless.com
Revision
number Release date Changes
1.3 Jun 2007 - Added MC8785 / AC885E / AC885U
- Updated idProduct values
1.4 Sep 2007 - Added vendor commands: Get TRU-Install Information (page 68), Set TRU-
Install Mode (page 69)
1.5 Feb 2008 - Removed old products, added C885
- Updated USB descriptors for MC8785V / AC885E / C885
- Updated USB architecture for MC8785V / AC885E / C885
- Updated descriptions on non-MUX and MUX mode for MC8785V / AC885E
/ C885
1.6 Apr 2008 - Added MC5727.
- Removed AC597U.

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6 Proprietary and Confidential 2130634
1.8 Sep 2008 - Changed document title (removed ‘Embedded Module’, added ‘Compass’
- Added MC8790, AC8790V, C597, C888
- Reorganized and updated Table 1-1, “Devices described in this guide,” on
page 9
- Updated Mux, Non-Mux, and Hybrid-Mux sections in Chapter 2 to reflect
details of new devices, including NMEA and Mass Storage.
- Added Mass Storage section
- Split and updated USB descriptor information into multiple tables in
Appendix A.
1.9 Sep 2008 - Added MC8791V and MC8792V
Revision
number Release date Changes

Rev 1.9 Sep.08 Proprietary and Confidential 7
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Document organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Related documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
USB architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
USB standards compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Supported driver architectures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Non-MUX (non-multiplexing) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MUX (multiplexing) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Hybrid-MUX (Hybrid multiplexing) mode . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Activating / Deactivating MUX mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
USB-standard Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
USB Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
AT/PPP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
HIP (Host Interface Protocol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
CnS (Control and Status). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DM (QUALCOMM Diagnostic Monitoring) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
NMEA (National Marine Electronics Association) . . . . . . . . . . . . . . . . . . . . . . 36
Data 1, Data 2, Data 3 (Additional PPP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Mass Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
USB descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Vendor-specific commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Command availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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8 Proprietary and Confidential 2130634
Set Device Power State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Set Mode Non-MUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Set Mode MUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Get Mode MUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Get NDIS Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Get NDIS Preference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Get Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Set Mode NMEA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Get Mode NMEA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Set Host Power State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Get TRU-Install Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Set TRU-Install Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Supported CDC USB commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

1
Rev 1.9 Sep.08 Proprietary and Confidential 9
1: Introduction
SierraWirelessmanufacturesseveralembeddedmodules,PC
Cards,ExpressCards,andUSBmodems.Eachofthesedevices
includesaUSBinterfaceforcommunicationwithahost
device.TheUSBinterfaceisbasedonaQUALCOMMchipset.
Table 1-1: Devices described in this guide
Network Device Device
TypeaQUALCOMM
chipset Standards
CDMA AC595 PC MSM6800 IS-95A / CDMA 1X
1xEV-DO Rev-0 / Rev-A
AC595U U
AC597E EMSM6800A
C597 U
MC5725
MC5725V MC MSM6800
MC5727 MC MSM6800A
GSM AC875 PC MSM6280 GSM / GPRS / EDGE /
W-CDMA / HSDPA
AC875U U
AC880 PC MSM7200
MSM7201 GSM / GPRS / EDGE /
W-CDMA / HSDPA /
HSUPA
AC880E E
AC880U U
AC881 PC
AC881U U
C885 UMSM7201A
C888 UMSM6290
MC8775
MC8775V MC MSM6280 GSM / GPRS / EDGE /
W-CDMA / HSDPA
MC8780
MC8781 MC MSM7200
MSM7201 GSM / GPRS / EDGE /
W-CDMA / HSDPA /
HSUPA
MC8785V MC MSM7201A
MC8790
MC8790V
MC8791V
MC8792V
MC MSM6290
a. MC—Mini Card (embedded module); PC—PC Card; E—PC ExpressCard; U—USB modem

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10 Proprietary and Confidential 2130634
Whereapplicablethroughoutthisguide,devicesarereferred
toindividually,orasgroupssharingcommondevicecharac‐
teristics:
•MC572X=MC5725/MC5725V/MC5727
•MC87XX=MC8775/MC8775V/MC8780/MC8781/
MC8785V/MC8790/MC8790V/MC8791V/MC8792V
•AC59X=AC595/AC595U/AC597E
•AC8XX=AC875/AC875U/AC880/AC880E/AC880U/
AC881/AC881U
•C59X=C597
•C8XX=C885/C888
Purpose of this guide
Note: Sierra Wireless provides
drivers and a connection
manager application (Watcher

)
for Windows 2000, Windows XP
and Windows Vista  .
Thisguideisintendedforusewhendesigningnon‐Windows
driversforthesemodules.Itdescribesthefollowinginfor‐
mation:
•Services(protocols)availableovertheUSBconnection(AT/
PPP,HCnSIP,CnS,DM,NMEA,Massstorage)
•ThephysicalUSBinterface(deviceandendpoint
descriptors)
•Supporteddriverarchitectures(non‐MUXmode,MUX
mode,Hybrid‐MUXmode)
•CommandsusedovertheUSBinterfacetocontrolthe
module’sstate
Document organization
Thisguideincludesthefollowingsections:
•Introduction(thissection)
•USB architecture
Describesthephysicalinterfaceandsupporteddriverarchi‐
tectures.
•Services
Describesavailabledatatransferservices(protocols).
•Appendix A USB descriptors
Providesdeviceandendpointdescriptorinformation.
•Appendix B Vendor-specific commands
Describescommandsthatcanbeusedtocontrolthemodule’s
state.
•Appendix C Supported CDC USB commands
DescribessupportforCDCUSBcommands,requests,and
notifications.

Introduction
Rev 1.9 Sep.08 ProprietaryandConfidential 11
Related documents
Relatedandsupportingdocumentsandproductsinclude:
Table 1-2: Related documentation
Document title Related content
UMTS Modems Supported AT
Commands (Document
2130617)
This document lists the standard AT commands supported
by the MC87XX, AC8XX, and C885. For descriptions of
standard AT commands, see AT Command Set for User
Equipment (UE) (Release 6).
AT Command Set for User
Equipment (UE) (Release 6) This document lists standard AT commands—the AC59X,
C59X, and MC572X support many of these commands.
CDMA 1xEV-DO CnS Reference
(Document 2130754) This document describes the CnS (Control and Status)
messages that are available for use with the AC59X,
C59X, and MC572X.
Extended AT Command
Reference (Document 2130621) This document describes proprietary AT commands for the
AC59X, C59X, and MC572X. For MC87XX-specific
commands, see MC87xx Modem Extended AT Command
Reference (Document 2130616).
MC87xx Modem CnS Reference
(Document 2130602) This document describes the CnS messages that are
available for use with the MC87XX.
MC87xx Modem Extended AT
Command Reference
(Document 2130616)
This document describes proprietary AT commands for the
MC87XX. For MC5725 / MC5725V / MC5727-specific
commands, see the Extended AT Command Reference
(Document 2130621).
Terminal Equipment to User
Equipment (TE-UE) multiplexer
protocol (Release 6)
This 3GPP technical specification describes the 27.010
multiplexer protocol.
The document (3GPP TS 27.010) can be downloaded from
www.3gpp.org.
Universal Serial Bus Class
Definitions for Communication
Devices, Version 1.1
This specification can be downloaded from www.usb.org.
Universal Serial Bus
Specification, Rev 2.0 This specification can be downloaded from www.usb.org.

Mini Card / AirCard / Compass USB Driver Developer’s Guide
12 Proprietary and Confidential 2130634

2
Rev 1.9 Sep.08 Proprietary and Confidential 13
2: USB architecture
Thischapterdescribessupporteddriverarchitecturesfordata
transfer,andthephysicalUSBinterfaceforeacharchitecture.
USB standards compliance
TheAC59X,AC8XX,C59X,C8XX,MC572X,andMC87XX
complywithUSB2.0standards,includingthefollowing:
•USBslaveonly
•USB2.0(backwardscompatiblewithUSB1.1)
•Full‐speed12Mb/sandlow‐speed1.5Mb/sdatatransfer
rates.
•High‐speed480Mb/sissupportedbyC8XX,MC8785V,
MC8790,MC8790V,MC8791V,andMC8792V.
•StandardUSBflowcontrol
•StandardUSBpowermanagement—SuspendstheUSBbus
whenitisidle,toconservepower.
ThearchitectureforthesedevicesisderivedfromtheAbstract
ControlModel(ACM)describedintheUniversalSerialBus
ClassDefinitionsforCommunicationDevices,Version1.1(CDC)
specification.
Tobestsupportadvancedpowermanagement,amodified
(non‐composite)endpoint/interfacemodelcombinesthe
CommunicationandDataInterfacepipeswithtwoproprietary
pipes(HIPandNMEA/Data1)intoonevendor‐specific
interface.
Note: It is assumed that you
have a good understanding of
USB principles and architecture.
For detailed information, refer to
Universal Serial Bus Class
Definitions for Communication
Devices, Version 1.1. This (and
other resources) can be
downloaded from www.usb.org.
Note: These devices do not claim any CDC classes in the descriptors
and do not support functional descriptors. As a result, these devices
are not normally compatible with native CDC-ACM drivers.
Supported driver architectures
Themodulessupporttwoorthreedriverarchitectures:
•Non‐multiplexing(Non‐MUX)mode‐Supportedservice
channels(seeServices,page33)arecarriedovermultiple
setsofendpoints.
•Multiplexing(MUX)mode‐Allservicechannelsarecarried
overasinglesetofendpoints,andifsupported,Mass
Storageisimplementedoverasecondsetofendpoints.
•Hybrid‐MUXmode‐Data/ATservicesarecarriedover
onepairofendpoints;theotherservicesaremultiplexed

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overasecondpairofendpoints.Ifsupported,MassStorage
isimplementedoverathirdsetofendpoints.
USB endpoints
USBendpointsareuniquelyaddressableportionsofaUSB
deviceusedtotransferinformationbetweenthehostand
module.Eachdefinedendpointisaunidirectionallinkfrom
themodemtothehost(IN)orfromthehosttothemodem
(OUT).
Note: The logical endpoint
numbers in this guide are used
for ease of reading. When
developing your drivers, you
must use the actual, physical,
endpoints.
EachphysicalendpointisdefinedinUSB descriptors(page39)
andisreferredtointhisdocumentbyalogicalendpoint
number(forexample,endpoint‘2’)anddirection(INorOUT).
Wherebidirectionalcommunicationisrequiredforaspecific
dataservice,twoendpointsareused:
•AC8XX/MC8775/MC8775V/MC8780/MC8781:These
endpointsusethesamelogicalendpointnumber.For
example,whereendpoints2‐INand2‐OUTareusedfor
bidirectionaltransferofATcommandsbetweenthehost
andmodule,theseendpointshavethesamelogical
endpointnumber(2)anddifferentphysicalendpoint
numbers(INis0x82andOUTis0x02).
•C8XX/MC8785V/MC8790/MC8790V/MC8791V/MC8792V:
Dependingontheservice,theseendpointsmayormaynot
havethesamelogicalendpointnumber.Forexample,
endpoints3‐INand3‐OUTareusedfortransferofNMEA
commands,while5‐INand4‐OUTareusedfortransferof
ATcommands.
Non-MUX (non-multiplexing) mode
Note: The module always starts
in non-MUX mode – the host can
then choose to put it in MUX
mode or take it out.
Thearchitectureusedfornon‐MUXmodedependsonthe
moduletype:
•AC59X/AC8XX/C59X/MC572X/MC8775/MC8775V/
MC8780/MC8781—Non‐MUXmodeisaproprietarynon‐
compositearchitectureinwhicheachservicetypeis
enabledoverspecificUSBendpoints:
·AC59X/C59X/MC572X—Table2‐1andFigure2‐1
·AC8XX/MC8775/MC8775V/MC8780/MC8781—Table2‐2
andFigure2‐2
•C8XX/MC8785V/MC8790/MC8790V/MC8791V/
MC8792V—Non‐MUXmodeisacompositearchitecturein
whicheachservicetypeisenabledoveritsowninterface.
SeeTable2‐3andFigure2‐3.

USB architecture
Rev 1.9 Sep.08 Proprietary and Confidential 15
Table 2-1: AC59X/C59X/MC572X—Non-MUX mode endpoints
Endpoint Supported service
0 (Control) Management element
1 IN (Interrupt) Notification element
Note: The interrupt line (1-IN) is used to flow control the
host from the modem over the AT/PPP channel only.
2 IN / OUT (Bulk) Primary data channel (AT/PPP)
4 IN / OUT (Bulk) HIP (carrying CnS and DM)
Note: If required, OEMs can consult with Sierra Wireless
to discuss how to change the default data service.
Possible service types are DM, HIP (carrying CnS), and
HIP (carrying CnS and DM).
5 IN / OUT (Bulk) NMEA
•Enabled by default only on MC5725 / MC5725V
/ MC5727.
6 IN / 7 OUT (Bulk)—
Interface 1
Note: TRU-Install mode
uses Interface 0.
(C59X only) Mass storage (when enabled)
Note: You can access the micro-SD device in both
TRU-Install mode (Interface 0) and modem mode
(Interface 1). In TRU-Install mode, the TRU-Install
CDROM and SD disk are presented as two logical unit
numbers (LUNs).

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Figure 2-1: AC59X/C59X/MC572X—Non-MUX mode endpoints
NMEA
HIP (carrying CnS),
HIP (carrying CnS and DM), or
DM
AT
AT and PPP
0
Interface 0
1 IN
USB
interface
The host-side driver
accepts and interprets
incoming and
outgoing data for each
supported service
(AT, HIP, DM, NMEA).
Each service uses a
different set of USB
endpoints.
Host Device AC59X / C59X / MC572X
Management
Element
endpoints
AT
NMEA
Interface 0
2 IN
2 OUT
Interface 0
4 IN
4 OUT
Interface 0
5 IN
5 OUT
Note: The default data service can
be changed if required. Contact
Sierra Wireless for details.
Control
Notification
Element
Interrupt
Note: Used to flow-control the host
over the AT channel only.
HIP (carrying CnS),
HIP (carrying CnS
and DM), or
DM
Note: The factory
default setting for the
service on endpoint 4 is
HIP (CnS & DM).
MS (Mass Storage)
MS Driver
(C597 only)
Interface 1
6 IN
7 OUT
Note: When in TRU-Install
mode, the micro-SD
device uses Interface 0
(same endpoints).

USB architecture
Rev 1.9 Sep.08 Proprietary and Confidential 17
Table 2-2: AC8XX/MC8775–MC8781—Non-MUX mode endpoints
Endpoint Supported service
0 (Control) Management element
1 IN (Interrupt) Notification element
Interrupt used by the module to flow control the host
over each supported data channel (AT, HIP, Data 1).
2 IN / OUT (Bulk) Data 1 (PPP) (Primary PPP context)
Also supports AT commands to set up the PPP
context.
3 IN / OUT (Bulk) (MSM7201-based modules only)
NMEA
Supported on AC880/AC880E/AC880U/AC881/
AC881U/MC8780/MC8781 if all of the following are
true:
•Firmware revision F1_2_x_x or higher is used
•GPS is enabled
•Modem is not in boot-and-hold mode
4 IN / OUT (Bulk) HIP (CnS and QUALCOMM DM diagnostics)
5 IN / OUT (Bulk) AT (AT / PPP) (Primary AT context)
Note: You can customize port mappings in non-MUX mode using the
AT!NVPORTMAP command. For details, see MC87xx Modem Extended AT
Command Reference (Document 2130616).
Note: AirCard modems may need to be reconfigured using AT!NVPORTMAP. For
non-MUX mode, the endpoint configuration shown here is recommended.

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Figure 2-2: AC8XX/MC8775–MC8781—Non-MUX mode endpoints
AT (AT / PPP)
(Primary AT context)
HIP
(carrying CnS / DM)
Control
Data 1 (PPP)
(Primary PPP context)
(Also supports AT commands to set
up the PPP context)
0
2 IN
USB
interface
The host-side driver
accepts and interprets
incoming and outgoing
data for each supported
service (AT, HIP, Data 1).
Each service uses a
different set of USB
endpoints.
Host Device AC8XX / MC8775-MC8781
endpoints
Data 1
HIP
(carrying CnS / DM)
AT
2 OUT
4 IN
4 OUT
5 IN
5 OUT
1 IN Interrupt
Note:
Endpoint 1-IN is an
interrupt endpoint used
by the modem to flow-
control the host for each
of the channels (AT,
HIP, Data 1, NMEA).
Note: Used to flow-control the host
over each channel (AT, HIP, Data 1).
Management
Element
Notification
Element
(MC8780 / MC8781 / AC880 / AC880E /
AC880U / AC881 / AC881U)
NMEA
Only if all of the following are true:
- F/W revision F1_2_xx or higher,
- GPS is enabled
- Not in boot-and-hold mode
3 IN
3 OUT
NMEA

USB architecture
Rev 1.9 Sep.08 Proprietary and Confidential 19
Table 2-3: C8XX/MC8785V to MC8792V—Non-MUX mode
endpoints
Endpoint Supported service
0 (Control) Management element
1 IN / OUT (Bulk)—
Interface 0 HIP
2 IN / OUT (Bulk)—
Interface 1 QUALCOMM DM diagnostics
3 IN / OUT (Bulk)—
Interface 2 NMEA
4 IN (Interrupt)—
Interface 3 Notification element
Interrupt used by the module to flow control the host
over each supported data channel.
5 IN / 4 OUT (Bulk)—
Interface 3 AT
6 IN (Interrupt)—
Interface 4 Notification element
Interrupt used by the module to flow control the host
over each supported data channel.
7 IN / 5 OUT (Bulk)—
Interface 4 Primary data channel (PDP context 1)
8 IN (Interrupt)—
Interface 5 Notification element
Interrupt used by the module to flow control the host
over each supported data channel.
9 IN / 6 OUT (Bulk)—
Interface 5 Secondary data channel (PDP context 2)
10 IN (Interrupt)—
Interface 6 Notification element
Interrupt used by the module to flow control the host
over each supported data channel.
11 IN / 7 OUT (Bulk)—
Interface 6 Tertiary data channel (PDP context 3)

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12 IN / 8 OUT (Bulk)—
Interface 7
Note: TRU-Install mode
usesInterface 0(endpoints
1-IN and 1-OUT).
(C8XX only) Mass storage (when enabled)
Note: You can access the micro-SD device in TRU-Install
mode (Interface 0) and modem mode (Interface 7). In
TRU-Install mode, the TRU-Install CDROM and SD disk
are presented as two logical unit numbers (LUNs).
Note: In these products, each COM port has its own interface and their endpoint
assignments are found in the USB interface descriptor. Do not use the
AT!NVPORTMAP command with these products.
Table 2-3: C8XX/MC8785V to MC8792V—Non-MUX mode endpoints
(Continued)
Endpoint Supported service