What are you using for the AA? The 2DATA card? As far as the documentation shows, there are no built in digital announcement trunks in the cpu on the IVS2000 only the IVS2 and up. See below for all MP info:
PN-CP00/PN-CP00-B/PN-CP00-C
MP - Main Processor card.
This card is equipped with Memory, TDSW (1024CH ´ 1024CH), 16-Line CFT, PB Sender, Clock, PLO (slave mode 2 ports), RS-232C Ports (2 ports), Modem for remote maintenance, and Internal Music-On-Hold tone source. One card per system.
PN-CP03/PN-CP03-C
MP- Main Processor card.
This card is equipped with Memory, TDSW (1024CH ´ 1024CH), 16-Line CFT, PB Sender, PB Receiver, Clock, PLO (slave mode 2 ports), RS-232C Ports (2 ports) for MAT/Built-in SMDR, Modem for remote maintenance, Internal/External Music-On-Hold tone source. One card per system (This card can be used only in 1 or 2 PIM system).
PN-CP02 /PN-CP02-C
MP - Main Processor card for Back Up MP System only.
This card is equipped with Memory, TDSW (1024CH ´ 1024CH), 16-Line CFT, PB Sender, Clock, PLO (slave mode 2 ports), RS-232C Ports (2 ports), Modem for remote maintenance, and Music-On-Hold tone source. Two cards per Back up MP System.