asterisk users - Jul 2004 - Transmitting a hook-flash down an E&M DS-0?

I'm trying to access feature codes remotely over a channelised T1 between a
Norstar MICS (rev 4) and Asterisk. The timeslots are configured E&M and have
been working fine under most circumstances except this one. There is mention
of accessing the facility by calling Flash() from within extensions.conf,
but I can't get it to work... Right now I can't tell if it's because
it's
being ignored by the Norstar or if it's because it's only supported on
zaptel analog interfaces, not cT1s.

Thoughts/pointers anyone? Ideally I'd like to be able to send
'(flash)981'
down the trunk as a step in my dialplan.

Many thanks.

Kris Boutilier
Information Systems Coordinator
Sunshine Coast Regional District