5
Table 1 - Phone Line Compatibility
Depending on the type of phone line, the unit may be compatible with Caller ID and outbound
call monitoring, or just outbound call monitoring only. The unit senses On/Off Hook by
detecting the telephone line voltage levels. If the voltage levels are not in standard local loop
ranges, the unit can be configured to detect On/Off Hook by means of current flow through
the device (see page 40). For additional information on voltage vs. current detection please
refer to Appendix A on page 44.
Caller ID Capture
Outbound Calls
On/Off Hook Detect
Standard Local Loop (1FB)
Yes
Yes
Voltage or Current
Analog Centrex
Yes
Yes
Voltage or Current
Ground Start (Trunk)
Yes Yes
Current
Only
ISDN Interface w/ Analog
Ports
Yes, if interface gener-
ates analog Caller ID
Yes, through
analog ports only
Current Only
Switch Analog Extensions
No Yes
Current
Only
Switch Digital Extensions
Not Compatible
Not Compatible
Not Compatible
ISDN, T1, Digital Centrex
Not Compatible
Not Compatible
Not Compatible
In order to capture Caller ID, an analog Caller ID signal must present on the phone line. This
signal can be sent directly from the phone company or certain types of ISDN interface units
can regenerate digital Caller ID data as analog Caller ID signals to its analog ports. Analog
Caller ID will not pass through telephone switches to extension lines. Even Caller ID
compatible telephone switches do not pass or regenerate analog Caller ID signals to extensions
lines. This unit will not operate if directly connected to digital phone lines or digital
extensions.
Summary of Contents for WHOZZ CALLING 2
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