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.
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Figure 1: Set Two Phone Lines=YES
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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
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Figure 2: Skeds 1 - 4
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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).