Thanks for posting. You can configure a maximum of 1000 unique DNIS substitution patterns on the ADTRAN unit, but wildcards may be used to handle larger numbers of phone numbers. I personally would prefer to handle all the aliasing, digit manipulation, or 800 number call routing on the PBX. One reason for handling this on the PBX is that having so many logic operations on the ADTRAN unit could negatively affect the unit's performance. Also, in this model, when things such as user extensions change, no changes are needed on the ADTRAN unit, which should simplify maintenance.