Leading '1' is being stripped

[jakthree]

Hi,
Two sites with 3CX v16.0.5.619 Pro Annual. All sites are on-premise Linux ISO on dedicated hardware (not VM).
Yealink T27G and T46S phones.
Sites are 4-digit extensions.
Site-1 (xxx.xxx.103.254) extension range 1000 - 1999
(xxx.xxx.103.44) extension 1044
Site-2 (xxx.xxx.43.254) range 2000 - 2999
(xxx.xxx.43.4) extension 2004
Bridge (ext-10100) set up between sites.

My problem is that the leading '1' is being stripped off.
Example,
I receive an external call from 12223334444 (or internal extension 1044).
The number shows up in the phone's History as 2223334444 (or 044).
When I select the number and press send, the call will fail because of the missing ‘1’.

Here is a snippet from Activity Log.

08/10/2020 12:22:57 PM - Route to L:1947.2[Extn:2004] sends Invite-OUT Send Req INVITE from 0.0.0.0:0 tid=ec42a27126f99d20 Call-ID=cKbnbnFWhzTcFdR1zpaELA..:
INVITE sip:[email protected]:5060 SIP/2.0
Via: SIP/2.0/ ;branch=z9hG4bK-524287-1---ec42a27126f99d20;rport
Max-Forwards: 70
Contact: <sip:[email protected]:5060>
To: <sip:[email protected]>
From: "Caller Name"<sip:[email protected]:5060;nf=b>;tag=86b28f06
Call-ID: cKbnbnFWhzTcFdR1zpaELA..
CSeq: 1 INVITE
Alert-Info: <http://www.notused.invalidtld>;info=national
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE, UPDATE
Content-Type: application/sdp
Supported: replaces, timer
Content-Length: 429

08/10/2020 12:22:57 PM - New call to CSTA supporting device: L:1947.2[Extn:2004]
08/10/2020 12:22:57 PM - L:1947.2[Extn:2004]: device's outbound URI is used: xxx.xxx.43.4
08/10/2020 12:22:57 PM - L:1947.2[Extn:2004]: SLA slot is acquired: 2004#0 'idle'
08/10/2020 12:22:57 PM - Added leg L:1947.2[Extn:2004]
08/10/2020 12:22:57 PM - [Flow] Call(C:1947): making call from L:1947.1[Line:10100<<+1044] to T:Extn:2004@[Dev:sip:[email protected]:5060,Dev:sip:[email protected]:5483;rinstance=ff994f4a78d83dbd]
08/10/2020 12:22:57 PM - [CM503027]: Call(C:1947): From: Line:10100<<+1044 ("Caller Name" <sip:[email protected]:5060>)  to  T:Extn:2004@[Dev:sip:[email protected]:5060,Dev:sip:[email protected]:5483;rinstance=ff994f4a78d83dbd]
08/10/2020 12:22:57 PM - [CM503004]: Call(C:1947): Route 1: from L:1947.1[Line:10100<<+1044] to T:Extn:2004@[Dev:sip:[email protected]:5060,Dev:sip:[email protected]:5483;rinstance=ff994f4a78d83dbd]
08/10/2020 12:22:57 PM - [Flow] Call(C:1947): has built target endpoint: Extn:2004 for call from L:1947.1[Line:10100<<+1044]
08/10/2020 12:22:57 PM - Call(C:1947):  from Line:10100<<+1044: Office hours override is active, now it is set to IN office hours
08/10/2020 12:22:57 PM - [CM503010]: Call(C:1947): Making route(s) from Line:10100<<+1044 to <sip:[email protected]:5060/UDP>
08/10/2020 12:22:57 PM - Remote SDP is set for leg L:1947.1[Line:10100<<+1044]
08/10/2020 12:22:57 PM - OnOffer from L:1947.1[Line:10100<<+1044]
08/10/2020 12:22:57 PM - Reported(Insert): SE:1947.1{Calling}
08/10/2020 12:22:57 PM - StatusNotification: SE:1947.1{Calling};  Skip=0

08/10/2020 12:22:57 PM - [CM500002]: Call(C:1947): Info on incoming INVITE from Line:10100<<+1044:
Invite-IN Recv Req INVITE from xxx.xxx.103.254:5060 tid=f46f6b3e40637568 Call-ID=dqYNJrudMpildlJf2dKLrA..:
INVITE sip:[email protected]:5060;rinstance=b7d4509059c1ed75 SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.103.254:5060;branch=z9hG4bK-524287-1---f46f6b3e40637568;rport=5060
Max-Forwards: 70
Contact: <sip:[email protected]:5060>
To: <sip:[email protected]:5060;rinstance=b7d4509059c1ed75>
From: "Caller Name"<sip:[email protected]:5060;rinstance=b7d4509059c1ed75>;tag=839fa13f
Call-ID: dqYNJrudMpildlJf2dKLrA..
CSeq: 2 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE, UPDATE
Content-Type: application/sdp
Proxy-Authorization: Digest username="10100",realm="3CXPhoneSystem",nonce="414d53595f31827177:3f1469ddea8abe34c172acfe34dfadb0",uri="sip:[email protected]:5060;rinstance=b7d4509059c1ed75",response="31aa528ab7de2c3aa62661a5cee96a5e",algorithm=MD5
Supported: replaces, timer
Remote-Party-ID: "Caller Name"<sip:[email protected]:5060>;party=calling
Content-Length: 294

08/10/2020 12:22:57 PM - [CM503001]: Call(C:1947): Incoming call from Line:10100<<+1044 to <sip:[email protected]:5060>

Notice that the From line has 'sip:044' instead of 'sip:1044'. I think this is why the phone(s) is displaying history of '044' instead of '1044'.
From: "Caller Name"<sip:[email protected].43.254:5060;nf=b>;tag=86b28f06

What part of 3CX ''sends Invite-OUT Send Req INVITE'?
Is there a filter inside 3CX that is setup by default to strip the leading '1'?
If yes, then how to disable?

Thank you,

 

[leejor]

Not the first time this has happened...

https://www.3cx.com/community/threads/digit-1-is-automatically-stripped-between-bridges.61452/

 

[jakthree]

I added two outbound rules. The first rule prepends a '1' to 3-digit number before routing internal call to the 3CX bridge between sites. The second rule prepends a '1' to 10-digit numbers before routing external call out our POTS gateway.

You can mark this a solved.