asterisk users - Jul 2010 - Problem with E1

Hi All, 

 I am facing problem with E1 line. I have installed Asterisk
(1.4.20.1) on a system with Digium TE420 card (Zaptel- 1.4.10) 

 But every
now and then I face problem of down E1's. The log show lot of entries like


 "pri_dchannel: PRI got event: HDLC Bad FCS (8) on Primary D-channel of
span 2" 

 This happens on a regular basis and the E1 becomes up after some
time. 

 My zaptel.conf is as follows: 

# Span 1: TE4/0/1 "T4XXP (PCI)
Card 0 Span 1" (MASTER)
span=1,1,0,ccs,hdb3
# termtype:
te
bchan=1-15,17-31
hardhdlc=16

# Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span
2"
span=2,2,0,ccs,hdb3
# termtype: te
bchan=32-46,48-62
hardhdlc=47

# Span
3: TE4/0/3 "T4XXP (PCI) Card 0 Span 3"
span=3,3,0,ccs,hdb3
# termtype:
te
bchan=63-77,79-93
hardhdlc=78

# Span 4: TE4/0/4 "T4XXP (PCI) Card 0
Span 4"
span=4,4,0,ccs,hdb3
# termtype:
te
bchan=94-108,110-124
hardhdlc=109

# Global data

loadzone us
defaultzone = us 

 Any advice what could be the problem..? 

 Thanks in
advance ! 

-Chetan Meshram
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Have you restarted zaptel since making any changes?
You are receiving FCS errors but you dont appear to have crc4 specified 
in your span lines.

If you have removed the option but not restarted zaptel yet then do that 
to see if it fixes the problem.

Chetan Meshram wrote:
> Hi All,
> 
>          I am facing problem with E1 line. I have installed Asterisk 
> (1.4.20.1) on a system with Digium TE420 card (Zaptel- 1.4.10)
> 
>         But every now and then I face problem of down E1's.  The log 
> show lot of entries like
> 
>                     "pri_dchannel: PRI got event: HDLC Bad FCS (8) on 
> Primary D-channel of span 2"
> 
>         This happens on a regular basis and the E1 becomes up after some 
> time.
> 
>         My zaptel.conf is as follows:
> 
>  
> 
> # Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1" (MASTER)
> span=1,1,0,ccs,hdb3
> # termtype: te
> bchan=1-15,17-31
> hardhdlc=16
> 
> # Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span 2"
> span=2,2,0,ccs,hdb3
> # termtype: te
> bchan=32-46,48-62
> hardhdlc=47
> 
> # Span 3: TE4/0/3 "T4XXP (PCI) Card 0 Span 3"
> span=3,3,0,ccs,hdb3
> # termtype: te
> bchan=63-77,79-93
> hardhdlc=78
> 
> # Span 4: TE4/0/4 "T4XXP (PCI) Card 0 Span 4"
> span=4,4,0,ccs,hdb3
> # termtype: te
> bchan=94-108,110-124
> hardhdlc=109
> 
> # Global data
> 
> loadzone        = us
> defaultzone     = us
> 
>  
> 
>              Any advice what could be the problem..?
> 
>             Thanks in advance !
> 
> -Chetan Meshram
>