asterisk users - May 2016 - Questions... connecting Asterisk to the World

Greetings,

asterisk list and community,

I have a problem in how our telefon switch (Siemens HiCOM)
"talks" with my new configured Asterisk server (V.11.18.0)

without my Asterisks server in the middle....

<phone> <--> Siemens HiCOM <-ISDN-> NTBA <-...-> PBX
Telekom

A phone connected to the switch requests an "Outgoing" line
by dialing "0". The party is connected via ISDN to
the carrier (deutsche Telekom) where the party preceeds
to dial numbers... and the call is connected....

What I can see while I am dialing is that with every 
digit I press it is being displayed on my phone.  
Further more, these digits are being processed by the
carrier. The call goes through, rings, immediately on
completion on the number or is rejected if busy.

 
WITH my Asterisks server in the middle of the exchange...

A phone connected to the switch requests an "Outgoing" line
by dialing "0". -->  Asterisks recieves incoming call on
"s".
The dialed digits are collected. The dial plan is 
executed accordingly but the "caller" recieves no 
more information about the dialed number. The number is
not placed in the "dialed" numbers simple functions like
"redial" do not work anymore.

Does anybody know what I am doing wrong here. Is there a
way to teach asterisk to behave exactly as if it were the
PBX (deutsche Telekom).  
So, as to say, act in a way that NO ONE will rightly know
the differance between having asterisk taking over the
function of the ISDN PBX.

What do I need?  A better dial plan to somehow better simulate
the way the switch normaly behaves?
Is hardware the problem?


My ISDN card in the server is:
"QuadBRI ISDN Digium Wildcard b410P"

Most everything else functionly works. incoming and outgoing calls
from and to ISDN, VoIP and other equipment work fine.

Just that the phones and switch don't recieve the "collected" 
number sequence the was dialed.

Any help or ideas anyone might have would be greatly appreciated.


thanks,


Stefan

On Sat, 14 May 2016, Stefan Becker wrote:
> A phone connected to the switch requests an "Outgoing" line by
dialing
> "0". --> Asterisks recieves incoming call on "s".
The dialed digits are
> collected. The dial plan is executed accordingly but the "caller"
> recieves no more information about the dialed number. The number is not 
> placed in the "dialed" numbers simple functions like
"redial" do not
> work anymore.
This is not my area of expertise, but I'll throw my $0.02 in...

When you 'request an outgoing line' by dialing 0, that call leg is 
processed by Asterisk, thus, that is what the phone 'sees' as the dialed
number and that's what the phone will send when 'redial' is pressed.

I think you need to make the outbound dial a single 'transaction' either
by using an extension pattern that includes the 0 like '05555555555' to 
dial 555-555-5555 or eliminate the 0 (and the idiom of 'requesting an 
outgoing line') and detect an internal vs external call via extension 
pattern matching.

Does your internal extension numbering plan conflict with external 
national numbering plan?

Dialing a prefix digit seems so 1970s to me.

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
             https://www.linkedin.com/in/steve-edwards-4244281

On Sat, 14 May 2016, Steve Edwards wrote:
> I think you need to make the outbound dial a single 'transaction'
either by
> using an extension pattern that includes the 0 like '05555555555'
to dial
> 555-555-5555 or eliminate the 0 (and the idiom of 'requesting an
outgoing
> line') and detect an internal vs external call via extension pattern
matching.
this is the dialplan that I use:

[ReceiveCallOut]
 exten = s,1,Read(LOKAL,,,,1,5)
  same =   n,Dial(SIP/${LOKAL}@tt)
  same =   n,Hangup()

When the user dials "0", the HiCOM ISDN switch immediately
goes "online" to the outgoing ISDN Copper Cable - connected 
to ... A) .... B)

A) connected to the NTBA in the wall jack to the NTBA phone company...
   the dialing preceeds to continue "offline" no dailtones are heard.
   The call is completed and connects
   
B) connected to the Asterisk ISDN Card....

   Asterisk server reacts by executing the above dial plan...

   CLI > "answered call from "...." to "s"

   The user has an open "answered" line and the dialing are collected
by
   listening to the DTMF tones.  The generated dial tones can be heard
   on the phone line.


Somehow the signaling on the line of the outgoing call is differant
when the cable is handeled by the PBX or by asterisk.

But why ?

Can't asterisk be configured to handle a call exactly as the 
otherwise connected phone company's PBX would?


thanks for listening,

Stefan

On Saturday 14 May 2016, Stefan Becker wrote:
> Greetings,
> 
> asterisk list and community,
> 
> I have a problem in how our telefon switch (Siemens HiCOM)
> "talks" with my new configured Asterisk server (V.11.18.0)
> 
> without my Asterisks server in the middle....
> 
> <phone> <--> Siemens HiCOM <-ISDN-> NTBA <-...->
PBX Telekom
> 
> A phone connected to the switch requests an "Outgoing" line
> by dialing "0". The party is connected via ISDN to
> the carrier (deutsche Telekom) where the party preceeds
> to dial numbers... and the call is connected....
> 
> What I can see while I am dialing is that with every
> digit I press it is being displayed on my phone.
> Further more, these digits are being processed by the
> carrier. The call goes through, rings, immediately on
> completion on the number or is rejected if busy.
> 
> 
> WITH my Asterisks server in the middle of the exchange...
> 
> A phone connected to the switch requests an "Outgoing" line
> by dialing "0". -->  Asterisks recieves incoming call on
"s".
> The dialed digits are collected. The dial plan is
> executed accordingly but the "caller" recieves no
> more information about the dialed number. The number is
> not placed in the "dialed" numbers simple functions like
> "redial" do not work anymore.
> 
> Does anybody know what I am doing wrong here. Is there a
> way to teach asterisk to behave exactly as if it were the
> PBX (deutsche Telekom).
> So, as to say, act in a way that NO ONE will rightly know
> the differance between having asterisk taking over the
> function of the ISDN PBX.
> 
> What do I need?  A better dial plan to somehow better simulate
> the way the switch normaly behaves?
> Is hardware the problem?
> 
> 
> My ISDN card in the server is:
> "QuadBRI ISDN Digium Wildcard b410P"
> 
> Most everything else functionly works. incoming and outgoing calls
> from and to ISDN, VoIP and other equipment work fine.
> 
> Just that the phones and switch don't recieve the "collected"
> number sequence the was dialed.
> 
> Any help or ideas anyone might have would be greatly appreciated.

Your problem is that you are still thinking in terms of old-fashioned, clicky-
clicky mechanical telephone exchanges.  Instead of "dialling 0 to request
an
outside line", you need to let Asterisk accept all the digits and then 
determine for itself whether the call is going to be an inside or outside one.

- If the user dials 3 digits  (or however long your internal numbers are),  
treat it as an internal number.
- If the user dials 6 digits  (or however long numbers are on your local 
exchange),  treat it as an external, local number.
- If the user dials 11 digits starting with 0  (or however long a number is in 
your country, including the STD code),  treat it as an external, STD number.
- If the number dials 9 or more digits starting with 00, treat it as an 
external, IDD number.


It will make your dialplan a little more complicated; but if it is too simple, 
you won't be taking full advantage of the power of Asterisk.

-- 
AJS

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