Programming instructions

273
Hardware Reference
Analog Services Unit
The Analog Services Unit (ASU) provides connectivity for analog trunks
and telephones (POTS and On-Premise Station, ONS). There are three
variants of 3300 ASUs:
• ASU
• Universal ASU
• ASU II (only on systems running Release 7.0 and later).
For information specific to embedded analog, refer to page 262.
Figure 53: ASU—Front Panel
Figure 54: Universal ASU—Front Panel
Figure 55: Universal ASU—Back Panel