Nokia 6081 External SIM Card Reader

Programmes After Market Services (P.A.M.S.)

Technical Documentation

NME–2A SeriesTransceivers

Chapter 6

External SIM Card Reader

CAE–2

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NME–2A

P.A.M.S.

External SIM Card Reader CAE–2

Technical Documentation

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NME–2A

Technical Documentation

External SIM Card Reader CAE–2

Contents

Page No

Introduction 4
Summary 4
Modes of Operation 4

Card Out Mode 4

Card In Mode 5
Installation of the CAE–2 5
Block Description 6

Overview 6

Power Block 7

MBUS Interface 7

SIM Interface 7

MCU Block 8
Hardware Description 8

Signals on Modular Connectors 8

Signals on SIM Connector 9
Power Block 9
MBUS Interface 9
SIM Interface 10
MCU Block 11
Circuit Diagram of GM8S 12
Component Layout Diagram of GM8S 13
Parts List of CAE–2 (EDMS: Issue 4.2) 14
Exploded View of CAE–2 16

Mechanical Items 16

List of Figures

Figure 1: Interconnection Diagram 6
Figure 2: Block Diagram 7
Figure 3: Circuit Diagram of GM8S Module 12
Figure 4: Component Layout Diagram of GM8S 13
Figure 5: Exploded View of CAE–2 16

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NME–2A

P.A.M.S.

External SIM Card Reader CAE–2

Introduction

Summary

The CAE–2 external SIM card reader is designed for the Nokia 6081 GSM
car telephone with type designation NME–2A and the handset with type
designation HSE–6XA.

The card reader is designed for a ID–1 SIM card (IC–card) in accordance
with GSM recommendation 11.11 and ISO standard ISO–7816–1,2,3. All
cards which do not comply to the GSM11.11 and ISO–7816 will be
rejected by the CAE–2. Only one card at a time can be used in the
external card reader.

The card reader is connected to the telephone via the system cable and
an extension cable, through one of its modular connectors. The handset
is connected directly to the card reader through the second modular
connector. The two modular connectors are connected in parallel, so the
handset and the extension cable can be connected to any of the two
connectors.

Technical Documentation

The CAE–2 works in parallel with the internal card reader in the 6081. If a
card is inserted in the internal card reader, and there is no card in the
external, then the 6081 will function as normal. If a card is inserted in the
external card reader, and there is no card in the internal, then the 6081
will work as if a card was inserted in the internal reader. The external
reader has the highest priority, so if a SIM card is inserted in both the
internal and the external card reader, then the external will handle all the
GSM operations, and the internal SIM card interface will be disabled. If a
conversation already was established when a card is inserted in the
external card reader, that conversation is interrupted, the internal card
reader is disabled, and the telephone will log onto the network using the
SIM card in external reader.

Modes of Operation

The CAE–2 has two modes of operations which is, with or without a SIM
card inserted in the card reader.

Card Out Mode

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The card reader will be in this mode when no SIM card is inserted,
and 12V DC is connected via the modular connector, and this is the
case even if the MBUS connection is missing. The LED is
iluminated when the reader is in the card out mode.

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P.A.M.S.

NME–2A

Technical Documentation

The card reader first sends a MBUS registration message (as a
slave unit) to the telephone (which is the master). The telephone
responds by sending a registration acknowledge message to the
card reader. When the acknowledge is received, the reader starts
looking for a SIM card. If the MBUS connection is missing it will
never start looking for a SIM card, because of the missing
registration acknowledge, so the LED will stay on even if a card is
inserted in the reader.

Card In Mode

When a SIM card is inserted in the reader, then the LED is turned
off, and it enters the card in mode. The card reader will do read
and write operations requested either from the telephone or SIM
card itself. All SIM operations, which are available from the user
interface in the telephone can can be done with a SIM card in the
internal card reader, can now be executed using the SIM card in
the external card reader. Phone calls can be initiated as soon as
the telephone is in service.

External SIM Card Reader CAE–2

If the SIM card is drawn out from the card reader, the SIM interface
will be disabled and the CAE–2 will enter the card out mode.

Installation of the CAE–2

The CAE–2 (10 is installed using a extension cable (11) which is plugged
into one of the modular connectors on the card reader and into the
connector on the system cable (5) normally used for the handset (2). The
handset is then connected to the second modular connector on the card
reader.

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