[Asterisk-Users] asterisk + dual phone lines + cisco + backup

[Ling C. Ho]

Dragan Mickovic wrote:

>I have couple of questions about the following. Currently I have 2 phone lines going
>into my house, and I would like to have both of those coming into asterisk. I also
>want to have a backup asterisk, so here are the main questions (I am knew to this so
>I apologize if I ask something stupid):
>
>- Is there a dual FXO card available from digium or do I need 2 x single FXO (if this is
>  the case then I'll need 4, 2 more for the backup asterisk).
>- Since I want both asterisk boxes to have the same extensions, is there any internal
>  procedures that do this, or maybe procedure for getting extensions from SQL? .. as a
>  worst case I can always rsync the data :)
>- I have a cisco 1750 with 2FXO, is it possible to use it, has anybody done it, and if it
>  can share some sample configs?
>
I have setup asterisk to work with a Csico 2600 with FXO using SIP, and 
Xlite.

My extension.conf is like this:
exten => _XXXXXXX,1,Dial(SIP/${EXTEN}@10.0.0.150)               ; 
"Please hold while..."
exten => _XXXXXXX,2,Playback(transfer,skip)     ; "Please hold while..."
exten => _XXXXXXX,3,Macro(stdexten,43878,SIP/${EXTEN}@10.0.0.150)
                                        ; (but skip if channel is not up)

* 10.0.0.150 is the cisco box ip
* 10.0.0.249 is the ip for my asterisk box
* 43878 is my internal centrax extenstion
* we need to dial *9 to get outside line, this is being done at the Cisco
* 3878 is my softphone extension

On my cisco:
!
dial-peer voice 924 voip
 incoming called-number 3878
 destination-pattern 3878
 session protocol sipv2
 session target sip-server
 codec g711ulaw
!
dial-peer voice 927 pots
 destination-pattern .......
 port 1/1/1
 forward-digits all
 prefix *9
!
sip-ua
 sip-server ipv4:10.0.0.249


I have a POTS dial peer setup on the cisco box to dial through the FXO 
if I make a 7 digit calls from my softphone.

Also, there is a VOIP dial peer to send incoming calls to my Asterisk box.

Basically, I can call 7 digit numbers from my softphone (should be easy 
to expand that to 10 digits), and it will call an outside number 
directly for me.
If someone need to reach me, they call the number of one of the voice 
line connected to the FXO card on the Cisco, get a dial-tone, then dial 
and extension to ring my soft phone. I think you can configure the cisco 
to directly route an incoming call to one of the voip destination, but I 
don't have a set up ready to show.

This is just a simple test I did a few weeks ago, doesn't cover a whole 
lot, but it's possible to make use of the FXO card on the cisco if you 
already have one.

...
ling



>- Having both asterisk boxes using the same lines at the same time, is there anything that
>  tells the box that it is primary (or backup) and if it should pickup the call (or not),
>  and sample configs would be great. And in case if someone leaves voicemail, does it stay
>  only on the primary asterisk, or does it get distributed on the backup as well?
>- any links about this would be great, and also info on asterisk implementation of MGCP.
>
>thanks
>micko
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