[Asterisk-Users] Zap channels - help

[Josué Conti]

I am installing one asterisk, to establish connection with my PABX Siemens,
in ISDN, link went up normally, also I obtain to internally call the
branches the PABX, normally, but when I try to dial for the PSTN, through
pabx with the command                  exten = _ 19xxxxxxxx, 1,
dial(zap/g2/${EXTEN}, 30) asterisk, reports me the following error:
-- Executing Dial("SIP/8110-a729", "zap/g2/1971411234|30") in new stack
    -- Called g2/1971411234
    -- Channel 0/1, span 2 got hangup
    -- Hungup 'Zap/32-1'
  == No one is available to answer at this
time
 However, when use the rule exten = _ 7xxx, 1, dial(zap/g2/${EXTEN}, 30) I
obtain to call the branches pabx, normally.
-- Executing Dial("SIP/8110-71ee", "zap/g2/7500|30") in new stack
    -- Called g2/7500
    -- Zap/32-1 is ringing
    -- Zap/32-1 answered SIP/8110-71ee
    -- Channel 0/1, span 2 got hangup
    -- Hungup 'Zap/32-1'
  == Spawn extension (default, 7500, 1) exited non-zero on 'SIP/8110-71ee'
Somebody would have some idea to help in this case me?
Greatings
Josué
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