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Specifications
Release 3.3 71
The four MOH tips & rings occupy an 8 pin female modular jack located on the rear panel.
Paging (3300 Universal ASU only)
There are two paging ports on the 3300 Universal ASU. The paging port is a transformer coupled
interface with 600 ohms input impedance. The port is full duplex and has a complete 2/4 wire
hybrid interface. The Balance impedance is set at 600 ohms.
Paging is accomplished by one of two methods:
• Zone control via outpulsed DTMF digits
• Emulates E&M trunks, using the contact closure control.
The 3300 Universal ASU provides two overhead paging outputs. In combination with their relay
contacts, two paging zones are supported.
System Fail Transfer (3300 Universal ASU only)
Four System Fail Transfer (SFT) relays are supported, one per LS trunk circuit. Control of the
relay is via loss of power (power fail transfer), or software directed transfer (System Fail
Transfer).
The SFT switches activate under the following conditions:
• Failure of the 3300 Controller
• Interruption of the system AC power
• Loss of the CIM link between the 3300 Controller and ASUs.
SFT requires fixed mapping between four ONS ports and LS trunks as follows:
Note: Only one port is supported through software on the system.
ASU Paging Zone Number
Paging Audio Circuit
Number
Paging Circuit’s Relay Position
1 1 Off
2 1 On
3 2 Off
4 2 On
0 1 & 2 Off & Off
LS Trunk ONS Port
1 13
2 14
3 15
4 16