You can always program up a TNS with an abbreviated number and use the PTS function of the ADCOI command.
From Alex
The parameter states the complete, translated number for an abbreviated number.
A represents * and B represents #.
In the case when a PTS signal is to be detected, its place in the complete number shall be stated with C, D, or E.
C Normal PTS. If time-out occurs the sending of digits is continued with the same type of register signalling as before time-out.
D PTS followed by DTMF sending of digits. If time-out occurs the sending of digits is continued with DTMF register signalling.
E PTS followed by DTMF sending of digits. If time-out occurs no more digits will be sent and the trunk line is disconnected.