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/usr/lib/python2.7/dist-packages/framework/subsystems/ogsmd/modems/muxed4line/channel.py is in fso-frameworkd 0.10.1-3.

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#!/usr/bin/env python
"""
The Open GSM Daemon - Python Implementation

(C) 2007-2008 M. Dietrich
(C) 2008 Michael 'Mickey' Lauer <mlauer@vanille-media.de>
(C) 2008 Openmoko, Inc.
GPLv2 or later

Package: ogsmd.modems.muxed4line
Module: channel
"""

from ogsmd.modems.abstract.channel import AbstractModemChannel
from ogsmd.gsm.callback import SimpleCallback

#=========================================================================#
class CallChannel( AbstractModemChannel ):
#=========================================================================#
    def __init__( self, *args, **kwargs ):
        if not "timeout" in kwargs:
            kwargs["timeout"] = 60*60
        AbstractModemChannel.__init__( self, *args, **kwargs )
        self.callback = None

    def setIntermediateResponseCallback( self, callback ):
        assert self.callback is None, "callback already set"
        self.callback = callback

    def handleUnsolicitedResponse( self, response ):
        if self.callback is not None:
            self.callback( response )
        else:
            print "CALLCHANNEL: UNHANDLED INTERMEDIATE: ", response

#=========================================================================#
class MiscChannel( AbstractModemChannel ):
#=========================================================================#
    pass

#=========================================================================#
class UnsolicitedResponseChannel( AbstractModemChannel ):
#=========================================================================#

    def __init__( self, *args, **kwargs ):
        AbstractModemChannel.__init__( self, *args, **kwargs )

    def _populateCommands( self ):
        AbstractModemChannel._populateCommands( self )

        c = self._commands["init"]
        # enable unsolicited codes

        c.append( "+CLIP=1" ) # calling line identification presentation enable
        c.append( "+COLP=1" ) # connected line identification presentation enable
        c.append( "+CCWA=1" ) # call waiting: send unsol. code
        c.append( "+CSSN=1,1") # supplementary service notifications: send unsol. code
        c.append( "+CRC=1" ) # cellular result codes: extended
        c.append( "+CSNS=0" ) # single numbering scheme: voice
        c.append( "+CTZU=1" ) # timezone update
        c.append( "+CTZR=1" ) # timezone reporting
        c.append( "+CREG=2" ) # registration information (TODO not all modems support that)