How do I get AS/5200 router to preceed dialback numbers with 132

[admin_2]

I have AS/5200 access router with ISDN & Mica modem connections. I have callback configured on all Async users via Cisco Secure +.

How can I get the router to preceed all dialled numbers with 132 ?

This will allow my telco to route the call at a discounted rate.

Existing Chat-script entries as follows.

chat-script offhook "" "ATH1" OK

chat-script callback ABORT ERROR ABORT BUSY "" "ATZ" OK "ATDT \T" TIMEOUT 60 CON

[#2]

The only way I see doing this is by

configuring "123" in the callback-dialstring

of the AAA server.