When upgrading DS2000 to DSX-80/160, much of the DS2000 station equipment is compatible with the new DSX-80/160 system. This allows the customer to preserve their substantial investment in DS-Series telephones when migrating to the DSX-80/160. Here are some basic upgrade guidelines:

1. The DS2000 4-slot KSU is not compatible with DSX.
   You must replace the DS2000 4-slot KSU with a DSX-80 KSU. The FCC prohibits the use of DS KSUs with DSX.
2. The DS2000 8-Slot KSU is not compatible with DSX.
   You must replace the DS2000 8-slot KSU with a DSX-160 KSU. The FCC prohibits the use of DS KSUs with DSX.
3. You must install a DSX CPU Card.
   The DS CPU PCB cannot run DSX software.
4. You must install a DSX 16 Port Digital Station Card (16ESIU) in KSU port 1.
   The DSX system will not operate without a 16ESIU PCB in slot 1.
5. To use telephone programming, you must connect at least one DSX telephone.
   DSX telephones connect only to DSX 16ESIU PCBs.
6. Do not use DS2000 power supplies in DSX-80/160.
   You must replace all DS2000 power supplies with DSX supplies. The FCC prohibits the use of DS power supplies with DSX.
7. DS-Series telephones must connect to DS 16DSTU PCBs.
   Install 16DSTU PCBs in any available KSU slot but slot 1.

Read Upgrading DS2000 to DSX-80/160.