Asterisk sends Invite h ext. to provider after call hung up

Asterisk Asterisk Support
1

My sip.conf is

[code]
[fritzbox620]
type=peer
host=192.168.178.1
defaultuser=620
secret=fjglkdfjlgkfdjglfdjl
insecure=invite
dtmfmode = rfc2833
context=fritzbox620
nat=no
fromdomain=fritz.box
fromuser=620
directmedia=no

[ext1]
type=friend
context=meinKontext
host=dynamic
nat=yes
secret=fdgadsfkjdhfkdhfkasdk
dtmfmode=auto
pedantic=no
disallow=all
allow=gsm

[general]
register => 620:blablaPW@192.168.178.1[/code]

My extensions.conf looks like

[meinKontext]
exten => _.,1,Dial(SIP/${EXTEN}@fritzbox620)

[fritzbox620]
exten =>_.,1,Dial(SIP/ext1)

When I now dial from ext1 any number and the called person answers and after terminating that talk Asterisk sends an invite to fritzbox.

INVITE sip:h@192.168.178.1 SIP/2.0
Via: SIP/2.0/UDP 192.168.178.41:5060;branch=z9hG4bK443d11b2
Max-Forwards: 70
From: "ext1" <sip:620@fritz.box>;tag=as63496c59
To: <sip:h@192.168.178.1>
Contact: <sip:620@192.168.178.41:5060>
Call-ID: 6d3adfdb55abde49671f8e6e3f7df18c@fritz.box
CSeq: 103 INVITE
User-Agent: Asterisk PBX 1.8.13.1~dfsg-1ubuntu2
Authorization: Digest username="620", realm="fritz.box", algorithm=MD5, uri="sip:h@192.168.178.1", nonce="blabla", response="blabla"
Date: Thu, 28 Feb 2013 10:50:03 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 327

v=0
o=root 330722884 330722885 IN IP4 192.168.178.41
s=Asterisk PBX 1.8.13.1~dfsg-1ubuntu2
c=IN IP4 192.168.178.41
t=0 0
m=audio 18178 RTP/AVP 3 0 8 101
a=rtpmap:3 GSM/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv

After that 192.168.178.1 sends 100 Trying and Asterisk then Cancel sip:h@192.168.178.1

For me it seems asterisk wants to notify fritzbox of the hungup by calling the h extension. But Asterisk has terminated the call itself, so there is no need to call hungup (and even fritzbox won’t understand it). How can I suppress this call to h-Extension? I’ve googled but found nothing about this problem.

2

The documentation for _ at least used to stress that you should never do _. or _!, as they will match h, i, t, …

3

Thanks, didn’t realise that this could be the cause.
Problem was that there were only letters matching numbers, but I want also call numers like *600 (my answering machine), so now instead of _. I now use _[0-9]
Thanks for the fast help.