NFPA 72 – 2013 introduced changes from the previous code requirements for supervising phone lines.
The requirement for phone supervision time increases from 5 minutes to 60 minutes.
The requirement for annunciating the failure of either phone line is changed to 6 hours.
Proper phone line supervision is accomplished with 4 schedules with one every 6 hours each day. This provides annunciation at the monitoring station within 6 hours of a failure on either phone line.
The below example describes using 4 schedules, 6 hours apart at 01:00, 07:00, 13:00 and 20:00.
In Panel Wide Parameters > Phone and Phone Parameters, set Two Phone Lines =YES.
Figure 1: Set Two Phone Lines=YES
Create 4 skeds 6 hours apart (see figure 2), each configured with Function= Send Test Report. Select the following options In the Function area of each Sked (see figure 3).
Parameter1: Deferred=NO.
Parameter2: Frequency=Scheduled.
Parameter3= Custom.
Parameter4= RG 1, Primary and RG 1, Backup 1 both selected.
Figure 2 Skeds 1 - 4
Figure 2: Skeds 1 - 4
Figure 3: Sked function settings for Skeds 1 – 4
NFPA 72 – 2010
26.6.3.1.4.1 Single Communications Technology.
Where only one communications technology is used, any failure of the communications path shall be annunciated at the supervising station within 5 minutes of the failure.
26.6.3.1.4.2 Multiple Communications Technologies.
Where two or more different technologies are used, the following requirements shall be met:
Provision shall be made to monitor the integrity of each communications path.
Failure of any communications path shall be annunciated at the supervising station and at the protected premises within not more than 24 hours of the failure.
Exception: Where technologies used are described elsewhere in this Code, monitoring for integrity shall be permitted to comply with those requirements.
NFPA 72 – 2013
26.6.3.1.5 Single Communications Path.
Unless prohibited by the enforcing authority, governing laws, codes, or standards, a single transmission path shall be permitted, and the path shall be supervised at an interval of not more than 60 minutes. A failure of the path shall be annunciated at the supervising station within not more than 60 minutes. The failure to complete a signal transmission shall be annunciated at the protected premises in accordance with Section 10.15.
26.6.3.1.6 Multiple Communications Paths.
If multiple transmission paths are used, the following requirements shall be met:
Each path shall be supervised within not more than 6 hours.
The failure of any path of a multipath system shall be annunciated at the supervising station within not more than 6 hours.
The failure to complete a signal transmission shall be annunciated at the protected premises in accordance with Section 10.15.
26.6.3.1.7* Single Technology.
A single technology shall be permitted to be used to create the multiple paths provided the requirements of 26.6.3.1.6 (1) through 26.6.3.1.6(3).
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