Escape Avaya 406 Shortcodes so they are presented to an outside line

We have an Avaya IP Office 406 with a BRI card with * 3 ISDNS lines attached.
We have a situation where we want to present the code *21*N# (or *64*N#) to an outside line. However the Avaya system is picking this up as a shortcode and the code never gets sent to an outside line (and so preventing the exchange level divert we intend to setup for the weekend).

The code *21*N#  - when passed to an outside line - should have the effect of diverting all our calls at exchange level to the number (N) we provide. We are doing this as we need to completly bypass our Avaya system over a weekend due to a power outage. (This is what are line provider has said).

Is there any way of "escaping" the shortcode syntax to trick the avaya into sending the digits to an outside line as if it was a normal (non-shortcode) set of digits ?

Any help much appreciated.
JBCRAsked:
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TheExpertTakerCommented:
Your *21 whatever will conflict with your system shortcode.  What you will have to do is either delete this short code or create a new 1:
e.g
*777N
Dial *21*N#
Trunk Group - Main

So when you dial *777N (N being the number you want to forward to) it will send *21*N' to the network.

With 3 ISDN lines I assume you have Hunting, in my locale call forwarding is not possible with Hunting enabled, so make sure this is possible first.  It might be worth your while doing a test with the shortcodes.
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JBCRAuthor Commented:
Thanks for the "solution". You were right  - our ISDN lines were not compatible with the forwarding service that our line provider sold us.
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