Services Units and Gateways
Analog Services Units
Description
Mitel Analog Services Units (ASUs) provide connectivity for analog trunks and telephones
(On-Premise Station (ONS) and POTS) to the 3300 ICP system. There are three variants:
• Analog Services Unit II
• Analog Services Unit
• Universal Analog Services Unit.
The 3300 ICP system supports up to four Analog Services Units in any combination..
Analog Services Unit II (ASU II)
The ASU II chassis supports up to 48 ONS phones or up to 8 LS trunks depending on how the
unit is configured with peripheral cards. See “AX and ASU II Specific Modules” on page 42 for
descriptions of modules you can use in the ASU II.
Table 48: Trunk Support by ASU Type
ASU Type
Number of Analog Ports
Supported (ONS)
Number of LS Trunks
Supported
ASU II 48 8
ASU 24 0
Universal ASU 24 4
Note: The ASUs support DTMF telephones only. Pulse and rotary dial phones are not
supported.
Note: The ASU II is supported in China and Brazil. The ASU and Universal ASU are not
supported in China or Brazil.
Note: The ASU II supports LS CLASS trunks; however, the ASU and the Universal ASU
do not support LS CLASS trunks.
Figure 26: Analog Services Unit II Front Panel
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