PBX Setting for Singapore Singtel ISDN

I had a chance to set up a PBX server with my ex company.  It was fun and recently , the server was down. I was called up and out of goodwill , I had a go at it.

The problem was someone upgraded rpm , modules and hence messing up the DAHDI settings.


Server --> Dell
ISDN Card -- > TE110P
Service Provider -- > Singtel ISDN-30

Software used --> AsteriskNow
Asterisk Core --> asterisk-core-1.6.2.24-1_centos5
GUI -- > Freepbx


these are the DAHDI settings (Freepbx)

Framing/Coding : CCS/HDB3/CRC4
Signalling: PRI-CPE
SwitchType: EuroISDN
Sync/Clock Source: 0
Context: from-pstn

*Others that are not mention , leave it as default

For the hardcore users,
# cat /etc/dahdi/system.conf
span=1,0,0,CCS,HDB3,CRC4
bchan=1-15,17-30
dchan=16
loadzone=sg


# cat dahdi-channels.conf


; Span 1: WCT1/0 "Digium Wildcard TE110P T1/E1 Card 0" (MASTER) HDB3/CCS/CRC4
group=0,11
context=from-pstn
switchtype = euroisdn
signalling = pri_cpe
channel => 1-15,17-31
context = default
group = 63

# cat /etc/asterisk/dahdi-channels.conf

; Span 1: WCT1/0 "Digium Wildcard TE110P T1/E1 Card 0" (MASTER) HDB3/CCS/CRC4
group=0,11
context=from-pstn
switchtype = euroisdn
signalling = pri_cpe
channel => 1-15,17-31
context = default
group = 63

Restart dahdi after applying the settings

*******
pri_net & pri_cpe control who acts like the "ISDN Network" and who acts like the "ISDN Customer Equipment". When you connect to a telco provided PRI, you'll want to set to "pri_cpe" *and* set the span in dahdi.conf to take clock from the line because you are customer equipment. If you are plugging your asterisk box into a PBX or something that is not a telco provided, you'll want to be set to "pri_net" because you are pretending to be the telephone network and you want to set the span in dahdi.conf to be timing level "0" to provide clock out onto the line.
*******

Check on dahdi status

From console

# asterisk -vvvr

dahdi show channels

 


dahdi show status