Wednesday, December 19, 2012

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



1 comment:

  1. Hi Sap,

    Good afternoon. I'm trying to check our PABX Dahdi in Asterisk so far both incoming and outgoing call suddenly cannot proceed. This is after power failure

    ISDN Card -- > Wildcard TE205P/TE207P dual-span T1/E1/J1 card
    Service Provider -- > Singtel ISDN-30

    One thing I've observe also is the Dahdi show channel from CLI of asterisk suddenly cannot be found or unknown also.

    Hope you can give me enlightenment coz my level of expertise is beginner.

    Thank you in advance.


    Mandy Aguirre

    ReplyDelete