[*] fractional PRI - no d-channels available?

[Matthew Beaton - Community Networks]

I would just like to post a huge thanks to Theodore Baschak for his June 12th post regarding the Shaw PRI.   I fought with this issue for two days and searched everywhere, and I can't believe rebooting the Shaw CSU (against the insistance of the Shaw installer) was all it took to get it running.  

I'd like to include some background on the specific issues that I had that were solved by this, as I suspect they affect other Shaw PRI installations with Asterisk.

I was seeing was that the light on my Digium TE122 card was green, and zttool reported it was OK - but on the Adtran CSU (3rd Gen) that Shaw provided, the EQ RMT LB light was solid amber.  I had assumed this was a software setting issue on Asterisk, and tried every conceivable setting there.

In the Asterisk console, I would get a message every second saying "PRI Error on span 0: We think we're the CPE, but they think they're the CPE too." - which had me attempt to use 'pri_net' as signalling, but that would just change the message to say "We think we're the network, but they think they're the network too".   

After doing some research, it seems that the Adtran CSU, once put in "Equipment Remote Loopback" mode - will only come out of that mode when it is sent a "1-in-3 pattern (100) for five seconds)" by the equipment.  Zaptel/asterisk does not appear to understand how to do this, and there is no button or switch to bring it out of that mode (nor does it seem can the Shaw provisioning centre bring it out remotely).  I believe the CSU was left in that mode by the Shaw technician at install.  A reboot of the Adtran CSU solved it though.

This is the configuration that worked for me:

# cat /etc/zaptel.conf
span = 1,1,0,esf,b8zs
bchan = 1-23
dchan = 24
loadzone = us
defaultzone = us

# cat /etc/asterisk/zapata.conf
[channels]
group=1
switchtype=national
signalling=pri_cpe
channel => 1-23
context=incoming

[trunkgroups]


Thanks,

Matthew Beaton
Community Networks
http://communitynetworks.ca/
matt at communitynetworks.ca
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