User manual

MTX-HSPA-PH8-P+G UMTS-HSPA terminal modem http://www.matrix.es
MTX-HSPA-PH8-P+G User Manual V.1.0 Pag. 24
Preliminary. Subject to change without prior notice
5. PH8 AT COMMAND INTERPRETER
After a successful installation of the PH8 driver package, the physical USB interface of the module is
represented in the operating system by two virtual interfaces, each assigned to a virtual COM port of its
own:
• Modem interface:
This interface is referred to as "Modem" if queried with AT^SQPORT. In the quick reference tables it is
named MDM.
The Modem interface is intended particularly for circuit and packet switched transmission (HSDPA, GPRS,
CSD).
All URCs are normally issued on the Application interface. URCs related to data calls (RING, NO CARRIER)
as well as the "^SYSSTART" URC are issued on the Modem interface. For further details on URCs please
refer to Section 1.9, Unsolicited Result Code Presentation and the configuration command AT^SCFG,
parameter <urcDestIfc>. ・
The Modem interface can be assigned to one of these PH8-P interfaces, with only a single dial-up
connection possible at the same time over the Modem interface:
-Asynchronous serial interface ASC0
-A logical channel of the USB composite device. In Windows XP, Windows Vista or Windows 7, for
example, it is set up as "Cinterion PH8-P HSDPA USB Modem" listed in the Windows Device Manager under
Modems.
- First multiplex channel if Multiplex mode is activated.
• Application interface:
This interface is referred to as "Application" if queried with AT^SQPORT. In the quick reference tables it is
named APP.
The Application interface is designed especially for controlling the PH8-P, i.e. for entering AT commands,
receiving URCs, or sending and receiving short messages. It cannot be used as data interface for HSDPA,
GPRS, CSD.
The Application interface can be assigned to one of these PH8-P interfaces:
- A logical channel of the USB composite device. In Windows XP, Windows Vista or Windows 7, for
example, it is set up as "Cinterion PH8-P USB Com Port" listed in the Windows Device Manager, under
Ports (COM&LPT).
- Second multiplex channel if Multiplex mode is activated.
Please note that URCs are normally indicated only on this interface, no matter whether the Modem
interface or the Application interface was used to send the AT commands for activating their presentation.
This URC management scheme is the default configuration recommended for a typical PH8-P application.
For further detail on URCs please refer to Section 1.9, Unsolicited Result Code Presentation, and the
configuration command AT^SCFG, parameter <urcDestIfc>.
Bear in mind that the Modem interface and the Application interface are handled by the same AT
command interpreter.
As a result, AT commands entered on both interfaces are not executed in parallel but sequentially, one
after the other. So an AT command issued on one interface will be buffered on this interface to be
executed after the other interface has completed processing earlier AT command(s). ・
When a data connection is established over the Modem interface, the Application interface can be used
simultaneously for any control functions. This eliminates the need for the user to enter AT commands,
such as +++, ATO and to switch back and forth between command and online mode when working on
one interface only.
See MTX-HSPA-PH8-P+G start user guide for a complete step by step installation process.