You have to change it from a superset. I found an old pocket guide I had. You plug the superset into the test line, status switch 2 on the control card must be closed.
Press either # or 70 to get into programming mode (take handset off hook. Dial the security code which is hopefully default 7772 or 1234. If correct it will come up with command 100. From what I can see in the pocket guide, Attendant recall seems to be system wide in command 100 programable from 10 to 70 seconds (register d)
100 11333311, the second 3 means 30 seconds recall on no answer, a 40 would mean 40 seconds.
I'm pretty fuzzy on this switch, never worked on them that much & it was awhile ago.
Paul Beddows
Avaya Consulting, Implementation, One on One EAS & Definity Training for PBX Administrators.
Vancouver, Canada
E-mail avaya@vancouver.hm