ISTEC 1008 TK-Anlage - zu alt für HFC?

    -- Executing Goto("SIP/102-0a43", "isdn|320|1") in new stack
    -- Goto (isdn,320,1)
    -- Executing SetLanguage("SIP/102-0a43", "de") in new stack
    -- Executing Wait("SIP/102-0a43", "1") in new stack
    -- Executing Dial("SIP/102-0a43", "Zap/g1/320|45|tr") in new stack
    -- Called g1/320
  == Primary D-Channel on span 1 up for TEI 65
    -- Channel 0/1, span 1 got hangup
    -- Hungup 'Zap/1-1'
  == No one is available to answer at this time
    -- Executing Hangup("SIP/102-0a43", "") in new stack
  == Spawn extension (isdn, 320, 4) exited non-zero on 'SIP/102-0a43'
  == Primary D-Channel on span 1 up for TEI 64
Oct 20 22:55:49 WARNING[180235]: chan_zap.c:7638 pri_dchannel: Ringing requested on channel 0/1 not in use on span 1
//Bemerkung: rufendes Telefon bekommt Besetztzeichen
Oct 20 22:55:56 WARNING[180235]: chan_zap.c:8018 pri_dchannel: Answer requestedon channel 0/1 not in use on span 1
//Bemerkung: Telefon an der ISTEC abgehoben
Oct 20 22:56:02 WARNING[180235]: chan_zap.c:8253 pri_dchannel: Hangup REQ on bad channel 0/1 on span 1
//Bemerkung: Telefon an der ISTEC wieder aufgelegt

[...]overlapdial=no
immediate=no
context=isdn
[...]

[...]
[isdn]
exten => s,1,NoOp(${CALLERID})
exten => t,1,NoCDR(${CALLERID})
exten => h,1,NoCDR(${CALLERID})
include => default

[default]
exten => _0NXXX.,1,Goto(national,${EXTEN},1)
usw.

[national]
exten => _0NXXX.,1,Wait(1)
exten => _0NXXX.,2,Dial(SIP/${EXTEN}@sipgate,60,tT)  ;
exten => _0NXXX.,3,Hangup()  ;
[...]