Westermo IDW-90 AT User Manual

Page 35

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4.5 Sub addressing

With outgoing and incoming calls the transmission of subaddresses can be performed 
using the ISDN supplementary service SUB. The subaddress is transmitted transparently 
from the calling party to the called party before the B channel connection is fully estab-
lished.
Please note, that this ISDN service typically has to be enabled by the ISDN service pro-
vider and may be charged additionally.

The subaddress is separated by an “/” from the called number.

The functionality Subaddressing can be used with the dialling procedures AT-command 
set, and automatic call.

Examples:

ATDisdnnumber[/subaddr]

isdnnumber 

Dialling called party number 

subaddr 

Called subaddress

RING [<rn>[/subaddr]]

CONNECT [<rn>[/subaddr]]

rn 

Calling party number

subaddr 

Calling party subaddress

The calling subbaddress can be set up using the configuration commands subi and subo.
Note:- The subaddress can be entered additionally into all tables that contain  

ISDN numbers for dialling or checking an ISDN address.

4.6 Automatic call establishment “Hotline” call

Automatic call establishment can be activated in three ways:

1. Initiated by an activation of the DTR control line (cmds= 6).

2.  Initiated by activity of the Data line from DTE (cmds=7), autobauding is disabled 

in this mode.

3. Initiated at power on reset, “always on” (cmds=8).

Autobauding is not supported when cmds is set to 6,7 or 8. Please select a baudrate  
with DIP-switches or AT command. If autobauding is selected DTE baudrate will be  
set to 9600 bit/s (br=4). 
The status line DCD/DTR can be used to indicate a successful connection, 
(see command cdcd and cdtr).
If a connection cannot be established successfully an automatic retry will be started.  
The duration of trying to establish the connection and the pause for next retry can  
be configured. 
The dialled numbers are taken from the table catab, all numbers from the call table 

catab will be taken one after each other. The parameter cato sets the timeout for estab-
lishing the call, capa the pause between call attempt and catry the number of retries.
The call can be disconnected through deactivating DTR see cdtr parameter, or through 
using the inactivity timer idle. 
To return to the AT- or Configurator command set the DIP-switches can be used SW3:5-
SW3:7.

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