[asterisk-users] PRI Problem

[Eric Merkel]

I am having a problem with a new PRI turn-up on dahdi 2.5.0 and
asterisk 1.8.5 that I have not seen before. The PRI is setup as B8ZS,
ESF and the span shows up and ok. This PRI is merely a crossover T1
going into an old DC0 class 5 switch.

I am getting the following errors over and over again

[Aug 16 10:26:10] NOTICE[8002]: chan_dahdi.c:3043
my_handle_dchan_exception: PRI got event: HDLC Bad FCS (8) on
D-channel of span 1
[Aug 16 10:26:10] NOTICE[8002]: chan_dahdi.c:3043
my_handle_dchan_exception: PRI got event: HDLC Abort (6) on D-channel
of span 1

I am also showing CRC4 errors on span as well.

# asterisk -rx "dahdi show status"
Description                              Alarms  IRQ    bpviol CRC4
Fra Codi Options  LBO
T2XXP (PCI) Card 0 Span 1                OK      1      0      2938622
ESF B8ZS          0 db (CSU)/0-133 feet (DSX-1)

I am leaning towards a misconfiguration on the span on the switch side
but here is my setup. Can anyone point me in the right direction?

# dahdi_hardware
pci:0000:06:08.0     wct4xxp+     d161:1220 Wildcard TE220 (5th Gen)

/etc/dahdi/system.conf
# Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER) B8ZS/ESF ClockSource
span=1,1,0,esf,b8zs
# termtype: unknown
bchan=1-23
dchan=24
echocanceller=mg2,1-23

/etc/asterisk/chan_dahdi
[channels]
language=en
context=Incoming-Pri
switchtype=dms100
signalling=pri_cpe
group=1
channel => 1-23

Thanks,
Eric Merkel