[Asterisk-Users] Specifying different SIP packet destination from hostname in request line?

2004-10-12 Thread David Gurr
I'm stumped.

I'm trying to configure my Asterisk setup to use a new embryonic UK ITSP
(who wants to remain nameless for the moment ...).

They supply their own UA, which works fine.

But Asterisk is proving to be a problem. Ethereal traces show that their UA
is sending SIP packets direct to an IP address aaa.bbb.ccc.ddd, but that the
address in the REGISTER and INVITE methods is specifying a hostname, eg:
   REGISTER sip:[EMAIL PROTECTED] SIP/2.0
and
   INVITE sip:[EMAIL PROTECTED] SIP/2.0

Unless I've missed something, there doesn't seem to be a way to tell
Asterisk to use a different destination for the SIP packet to that specified
in the method.

Is there a way to accomplish this?

Thanks

--
David Gurr
Congruity Ltd.
Hemel Hempstead
UK

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[Asterisk-Users] Legacy Toshiba Phones

2004-09-10 Thread David Gurr
Leo wrote:

 Not necessarily so. Recently I discovered that Artisoft's Televantage
 Soft PBX can support Toshiba Strata CS digital phones (DKT 2000 and
 3000) through a  PCI 16-port digital station card (Toshiba part
 #CS-DKTU-TV). Apparently, the Strata CS is an OEM licensed version of
 Televantage. It would be quite cool if an Asterisk driver can be
 developed for the 16-port digital station card.

Interesting. I just checked out the Televantage site at TrueData
(http://www.truedataonline.com). In their FAQ there's a question Can TV
(Televantage) use Digital Sets?. The answer includes the tidbit:

The Toshiba digital station cards are a slight variation of the Intel
MSI160PCI and are interoperable with other Dialogic - Intel Televantage
hardware.

The good news is that Intel have Linux drivers for the MSI160. Guess someone
needs to find some details on how the Tosh card differs ...

The bad news is that the Tosh station card doesn't come cheap ... a quick
google search shows prices around $2,500! For 16 ports? Ouch! At that price,
it's cheaper to throw the Tosh phones away and buy IP hardphones.

--
David Gurr
Congruity Ltd.
Hemel Hempstead
UK

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[Asterisk-Users] Any UK PipeCall/PipeMedia users?

2004-09-02 Thread David Gurr
Has anyone out there used the PipeMedia/PipeCall PSTN gateway?

Anything good/bad to say about it?

I'm considering using them for a new customer. They seem to have good rates,
good provisioning tools and (better still) give commission on usage to
dealers.

--
David Gurr
Congruity Ltd.   Fax: 0871 661 1756
Hemel Hempstead
UK

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[Asterisk-Users] ISDN BRI card exepriences in UK

2004-08-28 Thread David Gurr
Looking for folks experiences with ISDN BRI cards in the UK ... what's good
and what's bad and any gotchas.

Thx

--
David Gurr
Congruity Ltd.
Hemel Hempstead
UK

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[Asterisk-Users] FXO interfaces used in UK?

2004-08-27 Thread David Gurr
What FXO interface methods are folks using successfully in the UK?

I'm looking for good, known-to-work solutions for commercial use for two
PSTN trunks on an Asterisk box. Here's the options I have, as I see it:

i)  Two Digium X100Ps. Pro - cheap (c. £120), CE approved. Con - UK line
impedance mismatch, with resulting echo problems, plus needs two PCI slots.

ii) Digium TDM400P with two FXO modules. Pro - still fairly cheap (c. £200),
and can be set to UK line impedance, plus only uses one PCI slot. Con - Not
yet CE approved.

iii)Voicetronix Openline 4. Pro - reasonable price (c. £310), CE approved,
only uses 1 PCI slot. Con - UK line impedance mismatch.

iv) FXO gateway:
- Multitech MVP210. Pro - UK line impedance, no PCI slot needed, good local
technical support, CE approved. Con - expensive (£590 list)
- Mediatrix 1204. Pro - As above, plus not so expensive (£389 from
Telappliant). Con - can't get to see manuals to check functionality until
you buy it

I'm leaning towards either the TDM400P with 2xFXO, or the Mediatrix 1204,
though because of the cons I'd like to hear from folks that have
successfully used these in this type of configuration in the UK before I
shell out for them!

--
David Gurr
Congruity Ltd.
Hemel Hempstead
UK

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[Asterisk-Users] Multiple SIP phones ringing for same extension

2004-08-19 Thread David Gurr
Can someone confirm what I should expect the correct behaviour to be on
incoming calls if I have multiple SIP phones configured for the same
username?

I'd expect all the phones registered under the username that that extension
is associated with to ring, and the first one that answers gets it.

What I get, is just the first phone that registered gets a ring. The second
one doesn't ring at all.

--
David Gurr
Congruity Ltd.
Hemel Hempstead
UK

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[Asterisk-Users] Sound file quality

2004-08-09 Thread David Gurr
I'm building a phone-in demo system to use for introducing Asterisk to
prospective clients.

One of the things I'm wary of is their likely preconceptions that VoIP
systems will have poor audio quality.

As a result, I'd like to ensure that the voice prompts I'm using have the
best possible audio quality.

Is it possible to use sound files at higher than 8kHz sampling? My callers
will be coming in over PSTN to a VoIP gateway and then to me by uLaw/aLaw
... would higher sampling rates gain me anything in this configuration?

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] How do folks handle NAT routing?

2004-08-09 Thread David Gurr
I'm interested to hear how folks are handling NAT SIP routing issues in the
wild for commercial use.

Are you using a commerical SIP-aware NAT router solution? If so, what?

Are you using a software SIP-proxy like SER or siproxd? If so, which?

Do you set everything to canreinvite=no in sip.conf?

Any comments about real-world implementations would be welcome.

Thanks

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] RE: No incoming audio on incoming SIP calls

2004-08-04 Thread David Gurr
Solved my own problem ... thought I'd record it here for any others who come
across it.

The problem arises since Asterisk is trying to get out of the way of the
media stream, by doing a SIP re-INVITE to get the two ends of the
conversation to talk directly. This won't work, as Asterisk is telling the
calling party that the IP address to talk to is the private IP address of
the softphone on the internal network. Adding canreinvite=no to the
softphone's stanza in sip.conf solves the problem.

It would be helpful if Asterisk noticed that it's about to tell the other
end to use a private IP address ... the ranges are well known, and Asterisk
could do an implicit canreinvite=no in this situation.

The same problem didn't occur on outgoing calls as the Dial string includes
a t for timeout - as per the wiki, this means that Asterisk must stay in
the stream to be able to implement this.

Of course, the other way to solve this would be to use a proper SIP proxy
server which handles RTP stream port forwarding ... something I must get
around to.

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

 -Original Message-
 From: David Gurr [mailto:[EMAIL PROTECTED]
 Sent: 04 August 2004 14:05
 To: [EMAIL PROTECTED]
 Subject: No incoming audio on incoming SIP calls


 Now this is really frustrating. Everything was working fine, and
 now it isn't ... I don't think I've changed anything that would
 affect this, but I guess you never can be too sure.

 My setup is as follows:

 SIP softphone (SJphone) connected to Asterisk running my Linux
 NAT firewall box. This is all on the internal network.

 Asterisk then dialing out through various means - SIP to
 Stanaphone, FWD, Gossiptel and PSTN via an X100P.

 For incoming calls, an 0870 number from CallUK routes to my FWD
 account, and an 0870 number from Gossiptel routing to my
 Gossiptel account.

 Outbound calls all work fine ... I get audio in both directions,
 no problem.

 Incoming calls on either 0870 number connect fine, and audio goes
 from the softphone to the caller, but not the other way ... I
 hear no audio on the softphone from the caller's phone.

 I'm getting no alerts from my firewall that it's dropping anything.

 I know my way around packet sniffers, but I don't know what to
 look for here. What should the inbound audio packets look like?

 Thanks


 --
 David Gurr
 Congruity Ltd.
 Hemel Hempstead, UK


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[Asterisk-Users] Can Zap detect line is already off-hook?

2004-08-03 Thread David Gurr
I have the need for a slightly odd * configuration for testing purposes. I
have a working * setup with SIP softphones, VoIP trunks and a single X100P
clone for PSTN access.

The PSTN line I'm using for testing is also in use by other folks. For
incoming calls, I'd like to set is up so that * functions as a voicemail
backstop on this line. This much is working fine.

For outgoing, I'd like * to be able to tell if the line is already in use by
someone else - ie when it tries to take the line off hook, can it detect
that the line is already off hook and return to the dialplan that the line
is unavailable?

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] UK VoIP-PSTN gateway recommendations

2004-08-03 Thread David Gurr
I'm looking for recommendations for UK-based VoIP-PSTN gateways.

They should ideally offer:
-   IAX connection
-   Multiple simultaneous calls on a single account
-   Lower call rates than BT Business
-   Auto-top up or invoicing in arrears

I can find several that offer one of these facilities, but none that offer
all.

Thanks!

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] Selling asterisk-based solutions

2004-08-02 Thread David Gurr
I'm curious as to folks experiences in selling asterisk-based solutions.

In sales-speak, what are the common compelling reasons to buy?

I can think of the following potential ones, but I'm keen to find out what
seems to work in practise:

-   Customer wants to cut cost of calls, implements * and signs up to a
VoIP/PSTN gateway
-   Customer wants a new PBX but doesn't want to pay typical PBX prices
-   Customer has a distributed user base across offices and homes, and wants
to cost effectively integrate them into one PBX
-   Customer wants flexibility in configuration - needs might change rapidly

Thanks

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] Stripping characters from SIP dial strings

2004-08-02 Thread David Gurr
I'm having problems in dialing numbers over SIP that include characters from
the UK international phone number conventions.

I have my contacts in Outlook, with the numbers represented as:

+countrycode (area code) numberpart numberpart

eg:
+44 (20) 7834 1234

or:
+1 (801) 555 1234

I'm using the SJphone softphone, doing my testing through the Stanaphone
SIP/PSTN gateway, and have Asterisk in the middle working fine for
everything else.

SJphone can pick up the numbers from Outlook, and send them to Asterisk, but
Asterisk is finding that Stanaphone is barfing on any number that includes a
space or a ( or ).

If I manually enter the number without spaces or parentheses, it's fine.

The following questions arise:
-   Are these characters allowed in a SIP URI?
-   If so, is this an Asterisk problem, a Stanaphone problem, or an SJphone
problem?
-   How can I simply strip out spaces or parentheses from a dialed extension
string?

Thanks

--
David Gurr
Congruity Ltd.
Hemel Hempstead, UK

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[Asterisk-Users] How to allow softphone to dial thru with full SIP URI?

2004-07-27 Thread David Gurr
I'm using the SJphone softphone, and I've got a nice little SIP-only setup,
using (amongst others) stanaphone, VOIPtalk and FWD.

But I'd like to be able to use my SJphones to dial directly to folks who
provide a SIP URI, eg: [EMAIL PROTECTED], without either having to switch
profiles in SJphone (to direct SIP) or having to define calluk.com (in this
example) as a destination in extensions.conf.

Is this possible? The less user twiddling to get a call through, the better
...

--
David Gurr
Congruity Ltd.

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