asterisk users - Aug 2012 - chan_dahdi.c: No D-channels available! Using Primary channel 16 as D-channel anyway!

Hi all.
I have this problem with my Digium 2E1 card and PRI, for hours It works
well, with some meesages...

[Aug 10 09:20:31] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1

But PRI continue up....hours later... PRI go down.
I thought the problem was in the telco, but the strange thing is that I
have a loop cable in the second E1 and when I scan both E1 are  with
alarms=LMFA/OK and i have only the first E1 connected to the telco!!

messages
[Aug 10 09:20:31] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1
[Aug 10 09:20:32] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1
[Aug 10 09:20:32] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1
[Aug 10 09:20:32] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1
[Aug 10 09:20:32] NOTICE[32270] chan_dahdi.c: PRI got event: HDLC Abort (6)
on Primary D-channel of span 1
[Aug 10 09:20:36] WARNING[32270] chan_dahdi.c: No D-channels available!
Using Primary channel 16 as D-channel anyway!

gentoo1 ~ # dahdi_scan
[1]
active=yes
alarms=LMFA/OK
description=T2XXP (PCI) Card 0 Span 1
name=TE2/0/1
manufacturer=Digium
devicetype=Wildcard TE220 (5th Gen)
location=Board ID Switch 0
basechan=1
totchans=31
irq=16
type=digital-E1
syncsrc=0
lbo=0 db (CSU)/0-133 feet (DSX-1)
coding_opts=AMI,HDB3
framing_opts=CCS,CRC4
coding=HDB3
framing=CCS/CRC4
[2]
active=yes
alarms=LMFA/OK
description=T2XXP (PCI) Card 0 Span 2
name=TE2/0/2
manufacturer=Digium
devicetype=Wildcard TE220 (5th Gen)
location=Board ID Switch 0
basechan=32
totchans=31
irq=16
type=digital-E1
syncsrc=0
lbo=0 db (CSU)/0-133 feet (DSX-1)
coding_opts=AMI,HDB3
framing_opts=CCS,CRC4
coding=HDB3
framing=CCS/CRC4
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