Control Panel Installation
P/N 151204
3-13
3.10 Telephone Line Connection
The SK-5208 connects to two separate telephone lines to report data to the central station. An
RJ31X jack should be installed by the telephone company for each line. Figure 3-4 shows how
to wire the telephone line interconnect cords (not provided) to the SK-5208.
Note: To reduce the possibility of false alarms and transient damage, DO NOT bundle telephone wires together
with initiation or notification device wires.
Figure 3-4 Telephone Line Connection
The letter designator on the phone input indicates whether it is the Telco or House side of the
phone circuit. For example terminals 60 and 61 are labeled T1, T = Telco side of the phone
circuit and terminals 58 and 59 are labeled P1, P = Premise (House) side of the phone circuit.
The SK-5208 has built-in dual phone line monitors. These circuits will detect any fault in the
phone lines by monitoring the DC voltage present on the lines. If phone line voltage drops
below 3 VDC and is not corrected within approximately 60 seconds, an audible trouble signal
will sound and the panel will report a line fault trouble over the remaining phone line.
A situation could occur where both phone lines appear to be good, but the dialer cannot get
through to the central station on the first line. In this case, the SK-5208 will switch phone lines
and attempt the call again using the second line. Make sure the phone lines are programmed
properly (see Section 4).
Note: To comply with industry standards, this product is equipped with line seizure. Any time the system’s dialer
needs to communicate with the central station, it will not be possible to use any telephones that are on the
same line(s) as the system. Normally, this condition will last approximately one minute, but under adverse
telephone circuit conditions, could last for as long as 15 minutes.
Supervised
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