asterisk users - Dec 2004 - Zaptel/Zapata config from T410p to Brooktrout T1

HI, I'm trying to config a span from port 2 of a DIgium T410p to a
Brooktrout TR114-P8V-T1 card.  I have a T1-PRI from the TELCO in port 1 (thru
first port) working just fine with Asterisk 1.0.3 - been working fine for some
time now.  No problem with dialplan PSTN calls.  Now I'd like to
"route" specific DID numbers in thru the TELCO T1-PRI and out thru the
second port (span) on the Digium card to the Brooktrout T1.  The Brooktrout T1
is a robbed-bit e&m signaling.  I'm using a crossover cable and both the
Digium T1 port and the Brooktrout T1 card light up green.  Yet I can't get a
call through the Asterisk box to the Brooktrout.  I suspect some zaptel/zapata
config problem and I'm hoping someone can spot something.

When I call the number asterisk reports:

Executing Dial("Zap/11-1", "Zap/2-2/3213214321") in new
stack
Notice[2018]: app_dial.c c:743 dial_exec: Unable to create channel of type
'Zap'
= Everyone is busy/congested at this time
Accepting call from '1231231234' to '3213214321' on Channel
0/11, Span 1
Channel 0/11, Span 1 got hung up
Hangup 'Zap/11-1'

zaptel.conf

span=2,0,0,esf,b8zs
e&m=25-48

zapata.conf

signaling = em_w
context = faxserver
group = 3
channel = 25-28

exten.conf

exten => 1231231234,1,Dial(Zap/2-2/${exten})
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Message: 8
zaptel.conf

span=2,0,0,esf,b8zs
e&m=25-48

zapata.conf

signaling = em_w
context = faxserver
group = 3
channel = 25-28

exten.conf

exten => 1231231234,1,Dial(Zap/2-2/${exten})

I think if you change the last line to :

exten => 1231231234,1,Dial(Zap/G3/${EXTEN}) 

it should work.  I have had difficulty in the past doing direct selection of
individual channels on t-1 spans.