asterisk users - Oct 2004 - Problem with NFAS trunkgroups

Anyone here know about NFAS trunkgroups?

I have a TE405P card with spans 1, 3 and 4 connected to T1s. I have
happily had NI2 PRI running on them with each trunk having its own
D-channel. Using v1-0 from CVS.

/etc/zaptel.conf has the following:

span=1,1,0,esf,b8zs
span=2,0,0,esf,b8zs
span=3,0,0,esf,b8zs
span=4,0,0,esf,b8zs
bchan=1-23
dchan=24
bchan=25-47
dchan=48
bchan=49-71
dchan=72
bchan=73-95
dchan=96
loadzone = us
defaultzone=us

For non-NFAS, /etc/asterisk/zapata.conf has the following:

[trunkgroups]
#nothing
[channels]
switchtype = national
signalling = pri_cpe
group = 1
channel => 49-71,73-95
group = 2
channel => 1-23

With this config, I could successfully make calls on all B-channels.

Now I need, if possible, to use NFAS. I will be using it on four trunks,
with one primary and one secondary D-channel, and so 94 B-channels. To
test this, the telco has set up NFAS across two of the current trunks,
spans 1 and 3, with primary D-channel on span 1 (chan 24) and secondary
on span 3 (chan 72). Span 2 is still not connected, and Span 4 is a
standalone trunk.

I have changed /etc/asterisk/zapata.conf as follows:

[trunkgroups]
trunkgroup => 1,24,72
spanmap => 1,1,1
spanmap => 3,1,3
[channels]
switchtype = national
signalling = pri_cpe
group = 1
channel => 1-23,49-71
group = 2
channel => 73-95

What I find now is that I can make a call on channel 1, but no audio is
passed. I cannot make a call at all on channel 49. I can still make
calls on channels 73 to 95 and audio IS passed correctly.

Showing the first span gives me the following:

host1*CLI> pri show span 1
Primary D-channel: 24
Status: Provisioned, Up, Active
Secondary D-channel: 72
Status: Provisioned, Up, Standby
Switchtype: National ISDN
Type: CPE
Window Length: 0/7
Sentrej: 0
SolicitFbit: 0
Retrans: 0
Busy: 0
Overlap Dial: 0
Switchtype: National ISDN
Type: CPE
Window Length: 0/7
Sentrej: 0
SolicitFbit: 0
Retrans: 0
Busy: 0
Overlap Dial: 0

which looks correct. If the telco takes the primary D-channel down, the
secondary changes from Standby to Active and I get a message to say it
has switched.

But this doesn't look right:

host1*CLI> pri show span 3
No PRI running on span 3
host1*CLI> 

Can anyone shed some light on all this?

Thanks in advance!
Tony

-- 
Tony Mountifield
Work: tony@softins.co.uk - http://www.softins.co.uk
Play: tony@mountifield.org - http://tony.mountifield.org

I wrote:
> Anyone here know about NFAS trunkgroups?
Just a little more info (please see original message for main details):
> I have changed /etc/asterisk/zapata.conf as follows:
> 
> [trunkgroups]
> trunkgroup => 1,24,72
> spanmap => 1,1,1
> spanmap => 3,1,3
> [channels]
> switchtype = national
> signalling = pri_cpe
> group = 1
> channel => 1-23,49-71
> group = 2
> channel => 73-95
> 
> What I find now is that I can make a call on channel 1, but no audio is
> passed. I cannot make a call at all on channel 49. I can still make
> calls on channels 73 to 95 and audio IS passed correctly.
I have now taken the logical span off the spanmap lines:

spanmap => 1,1
spanmap => 3,1

That seems to have fixed the lack of audio when calling on channel 1, but
Asterisk still tells me that channel 49 is not available.

Some insight would be greatly appreciated!

Cheers
Tony

-- 
Tony Mountifield
Work: tony@softins.co.uk - http://www.softins.co.uk
Play: tony@mountifield.org - http://tony.mountifield.org

On October 19, 2004 11:01 am, Tony Mountifield wrote:
> Anyone here know about NFAS trunkgroups?
Yes, I worked with them in the dialup world on AS5248s and MaxTNTs.
> I have a TE405P card with spans 1, 3 and 4 connected to T1s. I have
> happily had NI2 PRI running on them with each trunk having its own
> D-channel. Using v1-0 from CVS.
> Now I need, if possible, to use NFAS. I will be using it on four trunks,
> with one primary and one secondary D-channel, and so 94 B-channels. To
> test this, the telco has set up NFAS across two of the current trunks,
> spans 1 and 3, with primary D-channel on span 1 (chan 24) and secondary
> on span 3 (chan 72). Span 2 is still not connected, and Span 4 is a
> standalone trunk.
I am not aware of NFAS working on any Digium equipment.

-A.

On Tue, 19 Oct 2004, Tony Mountifield wrote:
> I have now taken the logical span off the spanmap lines:
> 
> spanmap => 1,1
> spanmap => 3,1
> 
> That seems to have fixed the lack of audio when calling on channel 1, but
> Asterisk still tells me that channel 49 is not available.
I think you should have

spanmap => 1,1,1
spanmap => 3,1,2

Peter