Asterisk forward digits

I currently have an asterisk pbx trunk'd to a Avaya G3r via a PRI. I can make calls across in both directions without any issues using different numerical extensions on each system.
my current extensions.conf file is setup with dialing rules such as Dial(Zap/g0/${EXTEN}) where g0 is the PRI.

I'd like to be able to dial an extension on the asterisk and forward through the PRI to a hunt group on the avaya.

so if I dial for example extension 4500 on the asterisk it will forward through the trunk to the avaya and dial a hunt group 7100.

I need to find a way to push those digits across (7100) so that the avaya knows where to route to, but considering that the asterisk is receiving extension 4500.

P.S. The avaya works with DNIS codes 4 digits.

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IDSCAAuthor Commented:
Never was too simple ;)

exten => 4500,1,Dial(ZAP/g0/7127,120,r)


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