M20 Development Box; Environmental Requirements For The M20; Emc And Esd Requirements; Migration M1 To M20 - Siemens M20 Terminal Technical Description

Siemens Information and Communication Products

10 M20 Development Box

The M20 Development Box was developed as a variant of M20 Terminal for developing and testing own applications with
M20 Cellular Engine. The Development Box has almost the same functionality as the M20 Terminal with following ad-
ditional features:
• On-board male pins for each relevant pin of M20 80-pole connector not used by M20 Terminal (e.g. digital au-
dio interface, keyport interface, display interface), the connection to customers application might be with band
cables.
Note: Protection class IP40 can not be guaranteed for this variant.
• Male pins for application of other SIM card readers
The configuration of the additional pins is delivered with this product.
The A20 d-box is available from your local Distributor. Please note that the D-box is to be used for Development- and test
purposes only, and that deviating from the general terms of delivery no responsibility or guarantee is taken over on the
part of Siemens AG. Please contact your local distributor.

11 Environmental requirements for the M20

The applicable standards and internal and customer-specific supplementary requirements with regard to ambient conditi-
ons for the M20 are in accordance to IEC68.

12 EMC and ESD requirements

Standard ETS 300 342-1 dated 06/97 applies to the M20 as regards EMC and ESD requirements.
Additional requirements with regard to EMC/ESD:
• An EMC-filtered power supply must be made available to the M20 via the base unit.
When the M20 is used in vehicles, the requirements of standard ETS 300 342-1 dated 06/97, Section 9.5 must
be satisfied with regard to the power supply.
• When using the M20 with individual handsfree kits, the possibility of susceptibility problems exists.
• For additional EMC-relevant information (e.g. maximum length of connecting lines and shielding), see Chapter
EMC-relevant information for integrators of the M20

13 Migration M1 to M20

Applications using the M1 can be updated for use with the M20.
Following changes in the area of SW need to be taken into account.

13.1 SW comparison

13.1.1 SMS mode
The M1 offered only PDU SMS, on the M20 Text and PDU is available, (AT+CMGF)
Changes when creating PDU mode strings with the M20.
In the M1 the value for the UDL (User data length) could be set to any value larger the real data length.
In the M20 the value for UDL has to be the EXACT length of the user Data
Version 8 dated 15.03.00
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M20 Development Box
A
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