Interface Specifications ▀
ASR 5000 Installation Guide ▄
Central Office Alarm Interface
The Central Office (CO) alarm interface is a 10-pin Molex connector supporting three dry-contact relay switches. The
three normally closed (NC) relays can support normally open (NO) or NC devices. The following two figures show the
pin-out details for this interface and the next figure shows an example CO alarm configuration.
Table 94. SPIO CO Alarms Interface Pinout
Major Alarm - Normally closed
Major Alarm - Normally open
Minor Alarm - Normally closed
Minor Alarm - Normally open
Critical Alarm - Normally closed
Critical Alarm - Normally open
The 8-foot (2.4 meter) CO alarm cable shipped with the chassis supports redundant SPIO card installations. This “Y”
cable has two Molex connectors on one end that are keyed to fit into the CO Alarm interfaces in one direction only.
Each connector mates with one of the side-by-side SPIO cards. On the opposite end is a 9-pin terminal block that you
can mount to the telco cabinet or equipment rack frame.
The following figure and table display this cable assembly and its pinouts.
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