[cisco-voip] VG224 buzzing/humming on incoming calls only

[Paul Choi]

Mark,

This is just a guess but are the lines coming in using
the right signaling? Is it possible that
loop-start/ground-start are mixed up?

Paul

--- "MILLS, Mark" <mark.mills at baesystems.com> wrote:

> 
> Thanks to those that replied.
> 
> The device is grounded, and tip/ring are correct.
> 
> I have actually noticed something else with the
> problem which seems very
> strange to me:
> 
> If someone tries to dial the VG224 extension (x600)
> and the analog
> handset is physically connected to the VG224 port,
> the analog handset
> rings, and when its answered, the calling party gets
> the buzzing/humming
> noise, and the analog handset hears nothing.
> 
> BUT, if the analog handset is NOT connected to the
> vg224 when the call
> attempted, and you then physically plug it in while
> the ring attempt is
> being made, the analog handset starts ringing and
> the call can be
> answered correctly and both parties can hear each
> other.
> 
> Does anyone else have any suggestions?
> 
> Cheers,  
>   Mark
> 
>  
> 
> > -----Original Message-----
> > From: Paul Choi [mailto:asobihoudai at yahoo.com] 
> > Sent: Thursday, 11 October 2007 11:36 PM
> > To: Kevin Dunn; MILLS, Mark
> > Cc: cisco-voip at puck.nether.net
> > Subject: Re: [cisco-voip] VG224 buzzing/humming on
> incoming calls only
> > 
> > Are tip and ring reversed?
> > 
> > Paul
> > 
> > --- Kevin Dunn <cheesevoice at gmail.com> wrote:
> > 
> > > I just had this happen with a VG248.  Same exact
> > > issue, turned out the
> > > analog lines had been victims of some lightning,
> the
> > > Telco replaced teh
> > > facilities for the analog lines and the
> crackling
> > > went away... Hope that
> > > helps.
> > > 
> > > On 10/11/07, MILLS, Mark
> <mark.mills at baesystems.com>
> > > wrote:
> > > >
> > > >  Hi All,
> > > >
> > > > I was hoping I might be able to get some help
> with
> > > the setup of a VG224
> > > > that I am doing.  It is connected to CCM6
> cluster.
> > >  I can place calls FROM
> > > > the analog phones connected to the ports, and
> it
> > > all works properly with two
> > > > way audio.
> > > >
> > > > When making calls TO the analog lines on the
> > > VG224, the calling party
> > > > simply hears a loud buzzing/humming noise and
> > > nothing else.  The analog user
> > > > can hear nothing.
> > > >
> > > > This happens for incoming PSTN calls and calls
> to
> > > other extensions to the
> > > > VG224 connected devices.
> > > >
> > > > I have not setup a VG224 for incoming calls
> > > before, so there is obviously
> > > > something I have missed.  Below is the
> relevant
> > > config parts on the device.
> > > > Any help is appreciated!
> > > >
> > > >
> > > >
> > > > stcapp ccm-group 1
> > > > stcapp
> > > > !
> > > > voice-port 2/0
> > > >  ren 3
> > > >  idle-voltage low
> > > >  disc_pi_off
> > > >  input gain 10
> > > >  output attenuation 10
> > > >  playout-delay minimum low
> > > >  cptone AU
> > > >  timing digit 53
> > > >  bearer-cap Speech
> > > >  station-id number XXXXXXXXXX
> > > >  caller-id enable
> > > > !
> > > > sccp local FastEthernet0/0
> > > > sccp ccm 10.194.3.10 identifier 20 version 4.1
> > > > sccp ccm 10.194.4.10 identifier 10 version 4.1
> > > > sccp
> > > > !
> > > > sccp ccm group 1
> > > >  associate ccm 10 priority 1
> > > >  associate ccm 20 priority 2
> > > >  switchback method graceful
> > > > !
> > > > dial-peer voice XXXXXXXXXX pots
> > > >  service stcapp
> > > >  port 2/23
> > > > !
> > > >
> > > > Cheers,
> > > >    Mark
> > > >
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