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

Thu May 5 00:00:17 EDT 2011

Or you could go a step ahead - register your 2600 up with a sip
provider, disconnect provider cable from your house, and hook it up to
a fxs port on the 2600.  Now you keep the old lines, save some money
on cancelling the land line.  The telephone lines in my house happened
to be cat5 so I reterminated to rj45 and registered 7960's, and
configured a whole bunch of intercom lines, plus the SIP integration.

-nick

On Wed, May 4, 2011 at 4:24 PM, Pat Hayes <pat-cv at wcyv.com> wrote:
> Depending on what your goal is with your home rig, you might also get
> some good mileage out of "connection plar opx" (Off Premises
> eXchange). This works like "connection plar" in that a call into that
> FXO is automatically extended to the extension you provide, but with
> the difference that the analog line doesn't physically go off hook
> until it is answered by the remote device (an IP phone, voicemail,
> etc). This would allow the line to still ring in the rest of the
> house, but also ring a DN on the voip side. I use a similar config
> myself at home to allow single-number-reach to work.
>
> -Pat
>
> On Wed, May 4, 2011 at 4:19 PM, Tim Reimers <treimers at ashevillenc.gov> wrote:
>> Slick and worked, I believe.
>>
>>
>>
>> The command is in, at least, but I have to plug in the  line now to see if
>> it behaves..
>>
>>
>>
>> From: Wes Sisk [mailto:wsisk at cisco.com]
>> Sent: Wednesday, May 04, 2011 3:56 PM
>> To: Ryan Ratliff
>>
>> 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
>>
>>
>>
>> +1 for Ryan's recommendation.
>>
>> It's actually a bit of trickery - it specifies how long the router should
>> wait to receive callerid before processing the call.  It should have the
>> same desired effect.
>>
>> Regards,
>> Wes
>>
>> On 5/4/2011 3:45 PM, Ryan Ratliff wrote:
>>
>> Try the 'ring number' command under the voice-port.
>>
>>
>>
>> http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/voice_port_configuration_guide/ch2_alog.html#wpxref97673
>>
>>
>>
>> Yeah that doc looks to be old but you have to be able to control how many
>> rings before an FXO port answers.
>>
>>
>>
>> -Ryan
>>
>>
>>
>> On May 4, 2011, at 3:25 PM, Tim Reimers wrote:
>>
>> 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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