Least cost routing

(→Objective 1: pre-dialing)
(wikify slightly, categorize)
 
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This page is a work in progress; it documents my efforts to hack up some sort of script-based Least Cost Routing arrangement on my N900.  
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This page is a work in progress; it documents my efforts to hack up some sort of script-based Least Cost Routing arrangement on my [[Nokia N900|N900]].  
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== Objective 1: pre-dialing ==
== Objective 1: pre-dialing ==
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# if so, end the call, rewrite the number to suit, and autoredial before I the end user know or care about it
# if so, end the call, rewrite the number to suit, and autoredial before I the end user know or care about it
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Looking at D-BUS, when we place a call via GSM we get:
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Looking at D-Bus, when we place a call via GSM we get:
  =================================
  =================================
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  #:GSM Call Requested
  #:GSM Call Requested
  /opt/usr/bin/lcr * * com.nokia.csd.Call CreateRequested *
  /opt/usr/bin/lcr * * com.nokia.csd.Call CreateRequested *
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now, let's test that we can forcibly end the call before it happens:
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<source lang="bash">
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#!/bin/sh
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echo "Least Cost Routing script: detected outgoing call to $5";
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echo "Ending call to $5"
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dbus-send --system --print-reply --dest=com.nokia.csd.Call /com/nokia/csd/call com.nokia.csd.Call.Release
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</source>
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[[Category:N900]]
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[[Category:Connectivity]]

Latest revision as of 07:15, 15 September 2010

This page is a work in progress; it documents my efforts to hack up some sort of script-based Least Cost Routing arrangement on my N900.

[edit] Objective 1: pre-dialing

The first step is to get this working for regular PSTN access numbers over the GSM channel, so that I can use inclusive minutes rather than get charged through the nose for calling 0845, 0870 and suchlike.

In order to do that, I need to:

  1. intercept an outgoing GSM call, check dial string and see if we need to intervene
  2. if so, end the call, rewrite the number to suit, and autoredial before I the end user know or care about it

Looking at D-Bus, when we place a call via GSM we get: 

=================================
Arg 1: :1.20
Arg 2: null
Arg 3: com.nokia.csd.Call
Arg 4: CreateRequested
Arg 5: +442081802828
=================================
Arg 1: :1.20
Arg 2: null
Arg 3: com.nokia.csd.Call
Arg 4: Created
Arg 5: +442081802828
=================================

so, we can hook a script onto that using the following in dbus-scripts-settings 

#:GSM Call Requested
/opt/usr/bin/lcr * * com.nokia.csd.Call CreateRequested *

now, let's test that we can forcibly end the call before it happens: 

 #!/bin/sh
 echo "Least Cost Routing script: detected outgoing call to $5";
 echo "Ending call to $5"
 dbus-send --system --print-reply --dest=com.nokia.csd.Call /com/nokia/csd/call com.nokia.csd.Call.Release
Retrieved from "http://wiki.maemo.org/Least_cost_routing"