Doorpi Gruppenanruf "Busy here"

[outlander]

Hallo,

ich versuche mit folgendem dialplan alle Telefone im Haus klingeln zu lassen wenn ein call ueber die 10 hereinkommt.

[ Context 'internal' created by 'pbx_config' ]
  '10' (CID match '10') =>  1. Dial(${AllRing},${RINGTIME_DOOR})          [pbx_config]
                    2. Hungup()                                   [pbx_config]
  '10' =>           1. Dial(SIP/${EXTEN})                         [pbx_config]
                    2. Hangup()                                   [pbx_config]
  '800' =>          1. Answer()                                   [pbx_config]
                    2. Wait(1)                                    [pbx_config]
                    3. VoiceMailMain(100)                         [pbx_config]
                    4. Hangup()                                   [pbx_config]
  '_2XX' =>         1. Dial(SIP/${EXTEN},${RINGTIME})             [pbx_config]
                    2. VoiceMail(100,u)                           [pbx_config]
                    3. Playback(vm-goodbye)                       [pbx_config]
                    4. Hangup()                                   [pbx_config]

Das funktioniert auch.
Allerdings bekomme ich einen Fehler wenn einer der angerufenen Clients den call annimmt

    -- Executing [10@phones:1] Dial("SIP/10-00000006", "SIP/200&SIP/201&SIP/202&SIP/203&SIP/204,5") in new stack
[Mar 19 08:52:32] WARNING[100459][C-00000003]: app_dial.c:2520 int dial_exec_full(struct ast_channel *, const char *, struct ast_flags64 *, int *): Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)
[Mar 19 08:52:32] WARNING[100459][C-00000003]: app_dial.c:2520 int dial_exec_full(struct ast_channel *, const char *, struct ast_flags64 *, int *): Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)
[Mar 19 08:52:32] WARNING[100459][C-00000003]: app_dial.c:2520 int dial_exec_full(struct ast_channel *, const char *, struct ast_flags64 *, int *): Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)
    -- Called SIP/200
    -- Called SIP/204
    -- SIP/204-00000008 is ringing
    -- SIP/200-00000007 is ringing
       > 0x8becf09000 -- Strict RTP learning after remote address set to: 192.168.20.205:41402
    -- SIP/204-00000008 answered SIP/10-00000006
    -- Channel SIP/204-00000008 joined 'simple_bridge' basic-bridge <1c2037a8-9b2d-42c5-b272-45d3e3f85637>
    -- Channel SIP/10-00000006 joined 'simple_bridge' basic-bridge <1c2037a8-9b2d-42c5-b272-45d3e3f85637>
       > Bridge 1c2037a8-9b2d-42c5-b272-45d3e3f85637: switching from simple_bridge technology to native_rtp
       > Remotely bridged 'SIP/10-00000006' and 'SIP/204-00000008' - media will flow directly between them
    -- Got SIP response 486 "Busy here" back from 192.168.20.205:45356
       > 0x8becec0000 -- Strict RTP learning after remote address set to: 192.168.20.218:7078