Retronetworking

h1. Devolo MicroLink ISDNi

{{toc}}

ISDN modem / terminal adapter made by "devolo AG":https://www.devolo.de/ (former ELSA).

Manual

* attachment:devolo-Microlink-ISDNi-manual-en.pdf

* attachment:devolo-Microlink-ISDNi-manual-de.pdf (german)

* attachment:devolo-Microlink-ISDNi-datasheet-2002-de.pdf (german)

* attachment:devolo-Microlink-ISDNi-datasheet-2006-de.pdf (german)

|Supply Voltage|9-30V AC / 9-42V DC|

|Power Consumption|~4.0W|

|Power Connector|ELSA style|

|RS232 Connector|Mini-DIN8|

|Line Connector|RJ-11 (unusual for ISDN)|

h2. Hardware

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{{thumbnail(devolo-MicroLink-ISDNi-pcb-perspective.jpg)}}

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{{thumbnail(devolo-MicroLink-ISDNi-pcb-details1.jpg)}}

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We can see here:

* Siemens PSB2186H V1.1 ISAC-S TE attachment:PSB2186H.pdf

** 7.68 MHz XTAL

* Siemens PSB21525 H V2.1 HSCX TE attachment:PSB2152B.pdf

* PULSE T5015 (ISDN S-Interface transformer) attachment:T5011.pdf

* Ambient/Cirrus Logic MD4450C-SC-B (ARM based Modem Controller)

* 2 x ATMEL AT29C020 (2-MBit (256K x 8) 5-volt Only Flash Memory attachment:AT29C020.pdf

* Fairchild MM74HC

* SIPEX SP207E (RS232 Transceiver) attachment:SP207E.pdf

* ST L4962A (Voltage Regulator)

* 2 x Cypress CY7C109B (128K x 8 SRAM) attachment:CY7C109B.pdf

* ...

h2. AT-commands

<pre>

OK

ATI0

644

OK

ATI1

000

OK

ATI2

OK

OK

ATI2

OK

OK

ATI3

Ver. 2.29 vom 16.09.2004

OK

ATI4

  E1    Q0    V1    X4  

 $D0  

 &C1   &D2   &S0   &Y0  

 -M0  

 \D0   \Q3   \T0   \V8   \X0  

 *Q0  

OK

ATI5

1990.000.000 C ր� 0000000064

OK

ATI6

devolo MicroLink ISDNi

OK

ATI7

CPU  OK

INT  OK

ROM  OK

RAM  OK

EEP  OK

ISAC OK

HSCX OK

OK

ATI8

OK

ATI9

(#DVL1990\00000000\MODEM\\devolo MicroLink ISDNi00)

OK

</pre>

h3. Important AT-commands

<pre>

# set MSN (comma separated up to three)

AT$IMSN=0,"5210","5211",

# display defined MSN

AT$IMSN?

# display ISDN settings

AT$I?

# set ISDN settings to factory default

AT$IRES

# set D-channel protocol (DSS1/1TR6/AUTO)

AT$IDP=DSS1

# set ISDN bitrate (64000/56000) 64k bps by default)

AT$IBR=64000

# set B-channel protocol (see table below for possible values)

AT$IBP=Value

# set bearer capability for outgoing calls (see table below for possible values)

AT$ISCO=0,Value

</pre>

B-channel protocol

|_.Value|_.Description|

|X75     | X.75 protocol |

|X75T70  | T.70NL protocol |

|V120    | V.120 protocol |

|V110    | V.110 protocol |

|HDLC    | HDLC protocol |

|TRANS   | Transparent |

|HDLCP   | HDLC-PPP protocol |

|BTX     | X.75, T.70NL and Cept/Kit |

|X75FB1  | X.75 → HDLCP |

|X75FB2  | X.75 → V.120 → HDLCP |

|X75FB3  | X.75 → V.120 |

|V120FB1 | V.120 → HDLCP |

Bearer capability

|_.Value|_.Description|

|0 | Telephone service (3.1 kHz telephone service)|

|1 | Telephone service (analog telephone service)|

|2 | Group 2 fax operation|

|3 | Group 3 fax operation|