[cisco-voip] Use an FXO port for outbound calling only - no answering of incoming calls

[Tim Reimers]

Yup -

 

It's a CME implementation at home, actually -

 

My regular copper phone line is POTS - that is connected to the
red/green pair running throughout the house, with multiple phones on it.

It's also connected to an FXO port on a 2600 acting as a gateway -

 

For now, I want CME (and the associated VOIP phones/devices) not to be
answering calls on that line

*otherwise my non-technical family will not be amused that the house
phones ring once and never again

 

I want the regular house phones to ring until someone answers or the
answering machine picks up.

As it is, with no dial-peers at all on the router, the FXO port goes off
hook after one ring and tries it's best to do something to process that
call.

 

At some point down the road, I may integrate the rest of the house
phones on an ATA or something like that - but only after I've worked out
some kind of 

failover scenario such that if there were a power-failure (or
router-failure), the regular phones would get all incoming calls.

 

I'd get even more 'leave the phones alone' kind of thing if in order to
'fix' the phone system, my family had to go log into a router and
restart something while I was at work....

;-)

 

 

 

 

From: Ryan Ratliff [mailto:rratliff at cisco.com] 
Sent: Wednesday, May 04, 2011 3:19 PM
To: Paul
Cc: Tim Reimers; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Use an FXO port for outbound calling only - no
answering of incoming calls

 

I think the idea is he has two devices on the same copper and doesn't
want one of them to ever ring.

 

Think of it as having two phones in your house.  You want one of them to
only be used for outbound calls and the other to ring and be able to
answer inbound calls.

 

Unless you can do something with the physical wiring to make the FXO
never see ring voltage I think you are better off sticking an FXS card
into the router with the FXO, connecting the same device currently
sharing the pair with the FXO to this FXS and directing inbound calls to
the FXS port.

 

-Ryan

 

On May 4, 2011, at 2:06 PM, Paul wrote:

 

I believe so long as you keep the phone number that is associated with
that CO trunk, nobody should be calling it in the first place except by
chance. If you want to dedicate it for outbound calling and want it to
give a busy signal when someone calls it, just PLAR it to an
non-existent number within that box. A called FXO port will
automatically ring and give you dialtone with nothing configured as it's
supposed to.

 

________________________________

From: Tim Reimers <treimers at ashevillenc.gov>
To: cisco-voip at puck.nether.net
Sent: Wednesday, May 4, 2011 8:08 AM
Subject: Re: [cisco-voip] Use an FXO port for outbound calling only - no
answering of incoming calls

 

Hi all -

 

I'd like to use an FXO port for outbound calling only - 

I don't want the port to go offhook    _at all_  for any incoming
call/ring event- 

there is other POTS equipment on the same copper pair that should answer
any inbound calls.

 

Currently, I have no dial-peers at all in it-  but it's still answering
calls even with nothing configured on it.

 

I can shutdown the ports obviously, but that's rather counterproductive
to using them for outbound calling  ;-)

 

thanks, Tim


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