d110p无法呼出，可以呼入，如何解决呀

crc4开
zap show channel 2
Channel: 2I>
File Descriptor: 15
Span: 1
Extension:
Dialing: no
Context: from-pstn
Caller ID: 803
Calling TON: 0
Caller ID name: 803
Destroy: 0
InAlarm: 0
Signalling Type: ISDN PRI
Radio: 0
Owner: <None>
Real: <None>
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: alaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 128 taps unless TDM bridged, currently OFF
PRI Flags:
PRI Logical Span: Implicit
Hookstate (FXS only): Onhook

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James.zhu