calling specific 1800-number not going through.

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Asterisk Users 2 Comments

I have a strange problem.
I’m using the same dialplan to call 1800-number:

[toll-free]
;second “7” audiocodes strips
exten => _71800XXXXXXX,1,Dial(SIP/7${EXTEN:1}@pstn-5665,60,tr)

When I call this number (through pstn-5665) 18005000347 the phone always rings busy.
When I call any other 1800-number the calls goes through.

When I call the same phone number 18005000347 through a different line the calls goes through every time.

Here is call (busy) trace to that 18005000347 with sip debug ON:

Can anybody decipher why I’m getting busy signal to that particular 1800-number but not others?

< --- SIP read from UDP:10.0.0.110:5060 --->
OPTIONS sip:gateway@10.0.0.110 SIP/2.0
Via: SIP/2.0/UDP 10.0.0.110;branch=z9hG4bKac1457834404
Max-Forwards: 70
From: ;tag=1c1457828994
To:

Call-ID: 1457828497512012183855@10.0.0.110
CSeq: 1 OPTIONS
Contact:

Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE,UPDATE
User-Agent: Audiocodes-Sip-Gateway-/v.5.80A.032.003
Accept: application/sdp, application/simple-message-summary, message/sipfrag
Content-Length: 0

< ------------->

2 thoughts on - calling specific 1800-number not going through.

  • It took 36 seconds for that number to answer when I called it and it looks like the call hung up after 32000 ms when you dialed via asterisk.

  • Solved,
    It seems to me the vendor is blocking the 1800 number in Western Canada.
    Our second line I’m not sure where it is terminated: Toronto or USA or it could be they are blocking the 1800 line to home users and not for business lines.