Hardware Technical Reference Manual
AX and ASU II Specific Modules
Analog Line Cards (for AX and ASU II only)
4 + 12 Port Combo Card
• Four Loop Start (LS) trunks for analog connection to a central office
• 12 On-Premise Station (ONS) Lines for analog phones
• Four System Fail Transfer (SFT) relays that provide direct connection between an analog
telephone and a Loop Start trunk in the event of a system or power failure
• LS trunks and ONS lines connect to the module using a 25-pair male D-type (Amphenol)
connector.
ONS Cards
• 16 On-Premise Station (ONS) Lines for analog phones
• 24 On-Premise Station (ONS) Lines for analog phones
Protected ONS ports (ONSP) are available on the
• 4 + 12 Port Combo card (can be used on the ASU II and the AX).
• 24 port and 16 port ONS card (can be used on the ASU II and the AX).
The ONSP ports are suitable for off-premise applications and meet the requirements of
60950-01 and IEC 55024. Regular ONS ports are intended for on-premise applications only.
ONS lines connect to the module using a 25-pair female D-type (Amphenol) connector.
ONSP ports use the same loss plan settings as regular ONS ports. You require a TDM license
to enable each port.
Both the 4 + 12 Port Combo cards and ONS cards are hot-swappable.
LS CLASS
The AX and ASU II support Custom Local Access Signaling Services (CLASS) on the LS trunks
and ONS lines. CLASS allows the 3300 ICP system to pass Calling Line ID digits and CLASS
name information to display sets that support Caller ID functionality. The AX/ASU II also
supports ETSI signalling. The signalling type is set in the System Administration Tool.
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