asterisk users - Feb 2021 - Change by Deutsche Telekom end of februar. Can someone help me?

On 16.02.21 at 20:33 Luca Bertoncello wrote:
> Am 16.02.2021 um 19:56 schrieb Michael Maier:
> 
> Hi Michael,
> 
>>> Do I use pjsip?
>>
>> pjsip show registrations
> 
> gw*CLI> pjsip show registrations
> No objects found.
> 
> So I don't use pjsip... :(
Yes.
> Maybe could you send me an abstract of your configuration?
Take a look here [1]
>>> You mean, I have to create a "fake" Zone tel.t-online.de
in my Bind with
>>> these settings? Looks like dangerous, if they changes something...
>>
>> If you do that statically -> yes, you're right. You have to do
it
>> dynamically. I attached a script, which can be used to dynamically
build
>> a rpz each 15 minutes e.g. It directly asks the telekom nameserver for
>> naptr and srv entries. It looks like this:
>>
>> server 192.168.62.13
>> zone rpz-tonline
>> update delete tel.t-online.de.rpz-tonline.
>> update delete _sips._tcp.tel.t-online.de.rpz-tonline.
>> update delete _sip._tcp.tel.t-online.de.rpz-tonline.
>> update add tel.t-online.de.rpz-tonline. 60      NAPTR   10 0
"s"
>> "SIPS+D2T" "" _sips._tcp.tel.t-online.de.
>> update add tel.t-online.de.rpz-tonline. 60      NAPTR   30 0
"s"
>> "SIP+D2T" "" _sip._tcp.tel.t-online.de.
>> update add _sips._tcp.tel.t-online.de.rpz-tonline.      60 SRV  10 0
>> 5061 s-eps-110.edns.t-ipnet.de.
>> update add _sip._tcp.tel.t-online.de.rpz-tonline.       60 SRV  10 0
>> 5060 s-epp-110.edns.t-ipnet.de.
>> send
> 
> So if I undestand what you mean, you check the NAPTR and SRV für
> _sips._tcp.tel.t-online.de and save the record in a "virtual
domain"
> rpz-tonline, is it correct?
> Then I suppose you use this domain instead of tel.t-online.de in the SIP
> configuratione as "host", "outboundproxy" and
"fromdomain", is it correct?
No - you have to use the correct domain name in asterisk.  Only bind knows about
the fake domain. You have to configure bind correctly.

You have to create the fake domain in the bind config like this:
options {
...
         response-policy {
             zone "rpz-tonline";
         };
};

...

zone "rpz-tonline" {
         type master;
         file "/var/named/rpz-tonline-override";
         allow-query { any; };
         allow-transfer { any; };
         allow-update { any; };
};

All other things: take a look at the script! It's not that complicated.
> 
>> The script unregisters and registers the telekom trunks, if a change is
>> detected. This is done as long as there is no call active. This works
>> for me - but may not wort for others - feel free to change the code.
> 
> OK, I'll check it...
> 
>> Independently you have to add your own trunk names to get it working
>> (telekomPJSIP-a, ...).
> 
> Could you explain me that? I'm not an expert of Asterisk... :(
Well, if you want to use it, you really should engage yourself a bit more to get
it solved. It's not that easy. Or you may forget about the DNS fake and live
with
the problem, that asterisk could partly switch sometimes to another server - 
breaking the telephony. I don't think it would happen that often, because
Telekom
usually is extremely stable. Try at first to get a running pjsip configuration. 
The DNS theme could be done later on.


Regards
Michael

[1] 
https://www.ip-phone-forum.de/threads/hilfe-f%C3%BCr-grundeinstellung-asterisk-telekom-ben%C3%B6tigt.307115/post-2374234

Am 16.02.2021 um 22:32 schrieb Michael Maier:

Hi Michael
>> Maybe could you send me an abstract of your configuration?
> 
> Take a look here [1]
So, maybe I got it...
I tested the configuration with my Fax number and it seems to work (= I
can call the fax and can call my mobile phone from the fax with
"originate...").

On the registration I have:

[pbxfax]
type = registration
retry_interval = 20
max_retries = 10
contact_user = 00493514977291
expiration = 120
transport = transport-udp
outbound_auth = pbxfax
client_uri = sip:03514977291 at tel.t-online.de
server_uri = sip:tel.t-online.de

First: can I use tel.t-online.de or _MUST_ I change it? If I understand
your previous E-Mail, I'd say that I can leave tel.t-online.de...

Then I have a question by the Dialplan... Currently I have:

[fax-out]
exten => _X.,1,NoOp()
exten => _X.,n,Verbose(2,Call from FAX)
exten => _X.,n,Dial(SIP/pbxfax/${EXTEN},,R)

And I'll replace it with:

[fax-out]
exten => _X.,1,NoOp()
exten => _X.,n,Verbose(2,Call from FAX)
exten => _X.,n,Dial(PJSIP/pbxfax/sip:${EXTEN}@tel.t-online.de,,R)

Is it correct? I tried with
"PJSIP/pbxfax/pjsip:${EXTEN}@tel.t-online.de,,R" and it does NOT
work...
Is it correct, that I have to leave "sip:..."?

Thank you very much for your help!!
Luca Bertoncello
(lucabert at lucabert.de)