PRI Span continually up and down

New Install on fresh hardware, D channel on the PRI is continually going up and down with obviously no incoming or outgoing calls

This is using a T1 set for National ISDN2

Dahdi shows

Wildcard TE122 (VPMADT032), Card 1 - Port (span_1) OK ESF/B8ZS 24/24 pri_net Edit

Telcom provider is showing excess 0’s being sent, and say it may be a timing issue any ideas to get this working?

debug on the Pri span in asterisk is showing

< [ 02 01 7f ]

< Unnumbered frame:
< SAPI: 00  C/R: 1 EA: 0
<  TEI: 000        EA: 1
<   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
< 0 bytes of data
-- Got SABME from network peer.
Handling message for SAPI/TEI=0/0
  == Primary D-Channel on span 1 up
t200_expire
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 1, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 2, l3initiated 1, reject_except 0 ack_pend 0
T200 0, N200 3, T203 0

> [ 02 01 7f ]

> Unnumbered frame:
> SAPI: 00  C/R: 1 EA: 0
>  TEI: 000        EA: 1
>   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
> 0 bytes of data
-- Starting T200 timer
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 2, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0

< [ 02 01 7f ]

< Unnumbered frame:
< SAPI: 00  C/R: 1 EA: 0
<  TEI: 000        EA: 1
<   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
< 0 bytes of data
-- Got SABME from network peer.
Handling message for SAPI/TEI=0/0
t200_expire
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 2, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 3, l3initiated 1, reject_except 0 ack_pend 0
T200 0, N200 3, T203 0

> [ 02 01 7f ]

> Unnumbered frame:
> SAPI: 00  C/R: 1 EA: 0
>  TEI: 000        EA: 1
>   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
> 0 bytes of data
-- Starting T200 timer
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 3, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0

< [ 02 01 7f ]

< Unnumbered frame:
< SAPI: 00  C/R: 1 EA: 0
<  TEI: 000        EA: 1
<   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
< 0 bytes of data
-- Got SABME from network peer.
Handling message for SAPI/TEI=0/0
t200_expire
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 3, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0
Changing from state 5 to 4
q931.c:7618 q931_dl_indication: link is DOWN
-- T203 requested to stop when not started
-- Restarting T200 timer
TEI: 0 State 4
V(S) 0 V(A) 0 V(R) 0
K 7, RC 0, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0

> [ 02 01 7f ]

> Unnumbered frame:
> SAPI: 00  C/R: 1 EA: 0
>  TEI: 000        EA: 1
>   M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced mode extended) ]
> 0 bytes of data
Changing from state 4 to 5
  == Primary D-Channel on span 1 down
TEI: 0 State 5
V(S) 0 V(A) 0 V(R) 0
K 7, RC 0, l3initiated 1, reject_except 0 ack_pend 0
T200 1, N200 3, T203 0

i would change the timing source from:

signalling=pri_net

to

signalling=pri_cpe

And you would be correct.

This resolved the issue.