[Asterisk-Users] Re: equipment configuration help

Thu Sep 1 01:22:34 MST 2005

Erick,

After reviewing your original message a little closer it occurs to me
that you may be able to trunk Asterisk<--->Meridian with 2 Digium TDM400
cards. These are Quad FXS or FXO cards that could receive the lines from
your 8 analog line card.

You'll still need an E1 card (Digium or Sangoma) to terminate your PRI
line, but maybe with those TDM400 cards you can avoid the added cost of
a channel bank.

Regarding your WAN and branch offices; 

1. I've seen comments that tunneling VoIP traffic through IPSec can add
overhead/delay that could impact voice quality. Something to keep in
mind. I have trunked Asterisk boxes in MIA,BUE,SAO, etc. but trunk with
IAX over the Internet not tunneled or encrypted and performance is fine.

2. In your two locations with 15 & 50 users you should consider
installing Asterisk boxes in those locations and trunking them together
with IAX over the Internet. Perhaps go ahead and do the same thing with
the smaller office. You can justify a small Asterisk implementation in
an office with 5 phones.

3. For QoS look for L3 managed switches that can do QoS and/or bandwidth
allocation. Cisco, Dell, Nortel, HP can all do this, maybe even more
economical D-Links. Put these behind your PIX. It is also recommended to
do separate VLANs for any SIP hard phones you deploy. This adds another
layer of security and reliability.

Hope this helps.

On Wed, 2005-08-31 at 21:43 -0500, Erick Perez wrote:
> -M, The norstar has no E1 card, i will have to ask the nortel provider
> for the cost of it and configuration prices. I might end up paying the
> same as the channel bank.
> I was also thinking of using a Citel SIP-N-NORSTAR converter but its
> priced at around 3k. Too expensive because its only 24 ports and i
> have 32 nortel phones.
> 
> According to this wiki 
> http://www.voip-info.org/tiki-index.php?page=Asterisk+Nortel
> "One problem with this approach is that in a Norstar system, it isn't
> easy to forward an extension to an outside line, which means Norstar
> phone users will have to remember to do something different when they
> want to call a user who has been switched to an IP phone for example."
> 
> I guess that can be sorted out.
> 
>  Any manuals out there for configuration like
> [Telephone Company] ---E1--- [Asterisk with sangoma s102] ---T1
> channel bank--- [Norstar]? (only the asterisk-t1-norstar part)
> 
> Now another section, networking.
> The 3 offices are linked via VPNs like this
> Internet---ADSL Router-----Cisco PIX  Firewall---LAN
> doin ip tunneling will solve all communication problems internally,
> but what about QoS and SIP phones being taken to the public internet?
> one office has 5 users, the other 15, the other 50. ADSL Router
> recommendiations?
> and as for the phones being taken to the outside? what kind of
> configuration do i use? IAX is not an option.
> 
> 
> 
> On 8/31/05, asterisk groups <astgroups at adelphia.net> wrote:
> > Erick,
> > 
> > Consider trunking your Meridian to the Asterisk via an E1 card on the
> > Nortel. That way you'll be able to maintain your proprietary Nortel
> > phones and won't need a channel bank.
> > 
> > Your implementation would be something like this:
> > 
> > Cable & Worthless E1(or whoever)-->Asterisk(Sangoma port 1)-(Sangoma
> > port 2)-->Meridian--->Nortel Digital phones
> > 
> > suerte,
> > -M
> > 
> > On Wed, 2005-08-31 at 18:37 -0500, Erick Perez wrote:
> > > Update to myself:
> > > So in terms of equipment I will need:
> > > Sangoma a102 E1 (two E1 ports) plus a E1 crossover cable
> > > a channel bank with 8 FXS ports
> > >
> > > sounds expensive for just 8 analog ports. Any ideas?
> > >
> > >
> > >
> > > On 8/31/05, Erick Perez <eaperezh at gmail.com> wrote:
> > > > Hi, Im about to start shopping parts for an * box. We are migrating
> > > > from a Meridian Norstar+ Modular ICS
> > > >
> > > > Here are the customer details:
> > > > a) Meridian with 8 analog lines card and 32 nortel digital phones and
> > > > voicemail. We will interface * to the meridian using the analog ports
> > > > so we dont loose the phones.
> > > >
> > > > b)half E1. The * box will get half E1 (with DID) for connecting to the
> > > > local telco.
> > > > We need two recepcionist/operator phones (sip or whatever)
> > > >
> > > > So in terms of equipment I will need:
> > > > Sangoma a101 E1/PCI
> > > > an 8 port analog card
> > > > a channel bank?
> > > >
> > > > Can someone tell me if i really have to buy an analog card? or maybe
> > > > link me to a web site that explains (with images) how a t1/e1 is
> > > > managed?
> > > >
> > > > Thanks, and I apologize for this completely newbie question. I've
> > > > never seen images or instructions on how to handle this. Im not even
> > > > sure im using the right terms in Google.
> > > >
> > > > --
> > > >
> > > > -------------------------------------------
> > > > Erick Perez
> > > > Linux User 376588
> > > > http://counter.li.org/  (Get counted!!!)
> > > > Panama, Republic of Panama
> > > >
> > >
> > >
> > 
> > _______________________________________________
> > --Bandwidth and Colocation sponsored by Easynews.com --
> > 
> > Asterisk-Users mailing list
> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> > To UNSUBSCRIBE or update options visit:
> >   http://lists.digium.com/mailman/listinfo/asterisk-users
> > 
> 
> 
> -- 
> 
> -------------------------------------------
> Erick Perez
> Linux User 376588
> http://counter.li.org/  (Get counted!!!)
> Panama, Republic of Panama
> _______________________________________________
> --Bandwidth and Colocation sponsored by Easynews.com --
> 
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users