[Asterisk-Users] Re: equipment configuration help

Fri Sep 2 01:25:09 MST 2005

That is correct. Normally the layer 3 switches include advanced features
such as QoS but they may be available on simpler layer 2 switches.

I think the key words to look for are 'Managed, QoS (802.1p) with
priority queues, VLAN, (802.1q)'...maybe even PoE if you go with some
SIP phones in the future that can be powered by Power Over Ethernet.
Something else to keep in mind.

best of luck.

On Thu, 2005-09-01 at 22:03 -0500, Erick Perez wrote:
> Why an L3? just for the QoS part?
> I checked the alliedtelesyn 8624T at $1000.00
> http://www.cdw.com/shop/products/default.aspx?EDC=772793
> 
> but i also looked at the 8550T which has 48 port 10-100 but L2
> http://www.cdw.com/shop/products/default.aspx?EDC=773964&RecommendedForEDC=772793&RecoType=upsell
> at 900.00
> 
> is the QoS different? sorry for the question but i keep reading that
> asterisk needs qos to function better.
> 
> Thanks, 
> 
> On 9/1/05, asterisk groups <astgroups at adelphia.net> wrote:
> > Erick- Can't say if they will or not. In theory they should respect all
> > outgoing traffic unless being filtered by another device such as your
> > PIX. You might want to check with the ADSL router manufacturer just to
> > be safe.
> > 
> > 
> > On Thu, 2005-09-01 at 09:25 -0500, Erick Perez wrote:
> > > Do i have to change the adsl routers? or just do QoS with the Layer 3 switches?
> > > Will my ADSL router respect the QoS setting when sending the packet to
> > > the Internet?
> > >
> > >
> > > On 9/1/05, asterisk groups <astgroups at adelphia.net> wrote:
> > > > 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
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
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> > > > >
> > > > >
> > > > > --
> > > > >
> > > > > -------------------------------------------
> > > > > Erick Perez
> > > > > Linux User 376588
> > > > > http://counter.li.org/  (Get counted!!!)
> > > > > Panama, Republic of Panama
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