Urgent help please: Unable to create channel of type 'DAHDI'

i had to re-start our pbx last night and when it came back up, we’re unable to make external phone calls.
we can call from extension to extension, but can’t receive calls from outside, nor make them.

as I suggested… I’m in urgent and desperate help… if someone could assist i’d be extremely greatful…

logs as follows:

This is what error I get if I try to make a phone call to my mobile:
[Dec 22 10:31:12] WARNING[5610]: app_dial.c:1298 dial_exec_full: Unable to create channel of type ‘DAHDI’ (cause 34 - Circuit/channel congestion)

PBX1*CLI> dahdi show channel 1
Channel: 1
File Descriptor: 19 of type ‘DAHDI’ (cause 34 - Circuit/channel congestion)Unabl
Span: 1
Dialing: no
Context: inbound
Caller ID:
Calling TON: 0
Caller ID name:
Destroy: 0
InAlarm: 1
Signalling Type: ISDN PRI
Radio: 0
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, currently OFF
PRI Flags:
PRI Logical Span: Implicit
Hookstate (FXS only): Onhook

PBX1*CLI> pri show span 1
Primary D-channel: 16
Status: Provisioned, Down, Active
Switchtype: EuroISDN
Type: CPElFile Descriptor: 19 of type ‘DAHDI’ (cause 34 - Circuit/channel conges
Window Length: 0/7
Sentrej: 0
SolicitFbit: 0
Retrans: 0
Busy: 0
Overlap Dial: 0
Logical Channel Mapping: 0
T200 Timer: 1000
T203 Timer: 10000
T305 Timer: 30000
T308 Timer: 4000
T309 Timer: -1
T313 Timer: 4000
N200 Counter: 3
Overlap Recv: No

Status: Provisioned, Down, Active

That says your PRI span is down. Run “dahdi show status” to make sure that you don’t have any alarms on your physical E1 spans. If no alarms, I’d call your E1 provider to see if they can reset your circuit. Sometimes a span will drop out of service and need to be reset by the provider.