DSDPlus FMP24 missing specific transmissions in NXDN96 -- mystery

[rolypolyman]

I've been having a strange problem picking up my EMS system in Texas. This is a rural county with a very simple trunking system. I monitor it with FMP24.

Dispatch will alert the EMT for a new call. by saying "Medic 48." Normally I should then hear the address and nature of the 911 call. However I am not hearing that, instead it's about a minute of dead air. Then I hear "Medic 48, starting miles" and he clearly has the address and nature of the 911 call at that time. I can hear the rest of the transmissions normally, including the EMTs talking with the hospital, mileage, and so on.

So I'm missing the call with the address and nature of the call.

I don't think they're transferring it electronically, as a few times I've heard the EMTs asking dispatch to repeat the address, and they do so verbally and I hear all that.

The log during one of these problems looks like this:

2022/01/22 13:04:13 Freq=461.450000 RAN=1 Group call; TG=29 RID=662 [EMSBASE] Ch=657 2s <----- Dispatch: "Medic 48" (alerting them)
2022/01/22 13:04:32 Freq=461.450000 RAN=1 Registration; RID=695 [U48P] TG=29 ACCEPTED (address & nature of call are being read at this point)
2022/01/22 13:05:49 Freq=461.450000 RAN=1 Group call; TG=29 RID=676 [U47F] Ch=491 2s <---- Medic 48: "Start miles 122.4"

Is this indicating there are NO EVENTS at all on the network, including encrypted calls and channels without a frequency assignment? Or could these events actually be occurring? I don't know how to go about debugging this problem.

 

[a417]

I've been having a strange problem picking up my EMS system in Texas. This is a rural county with a very simple trunking system. I monitor it with FMP24.

Dispatch will alert the EMT for a new call. by saying "Medic 48." Normally I should then hear the address and nature of the 911 call. However I am not hearing that, instead it's about a minute of dead air. Then I hear "Medic 48, starting miles" and he clearly has the address and nature of the 911 call at that time. I can hear the rest of the transmissions normally, including the EMTs talking with the hospital, mileage, and so on.

So I'm missing the call with the address and nature of the call.

I don't think they're transferring it electronically, as a few times I've heard the EMTs asking dispatch to repeat the address, and they do so verbally and I hear all that.

The log during one of these problems looks like this:

2022/01/22 13:04:13 Freq=461.450000 RAN=1 Group call; TG=29 RID=662 [EMSBASE] Ch=657 2s <----- Dispatch: "Medic 48" (alerting them)
2022/01/22 13:04:32 Freq=461.450000 RAN=1 Registration; RID=695 [U48P] TG=29 ACCEPTED (address & nature of call are being read at this point)
2022/01/22 13:05:49 Freq=461.450000 RAN=1 Group call; TG=29 RID=676 [U47F] Ch=491 2s <---- Medic 48: "Start miles 122.4"

Is this indicating there are NO EVENTS at all on the network, including encrypted calls and channels without a frequency assignment? Or could these events actually be occurring? I don't know how to go about debugging this problem.

Have you verified this concern with others in the Texas forum? There might be someone who listens to them that can tell you exactly what is going on.

 

[AM909]

...
2022/01/22 13:04:13 Freq=461.450000 RAN=1 Group call; TG=29 RID=662 [EMSBASE] Ch=657 2s <----- Dispatch: "Medic 48" (alerting them)
2022/01/22 13:04:32 Freq=461.450000 RAN=1 Registration; RID=695 [U48P] TG=29 ACCEPTED (address & nature of call are being read at this point)
2022/01/22 13:05:49 Freq=461.450000 RAN=1 Group call; TG=29 RID=676 [U47F] Ch=491 2s <---- Medic 48: "Start miles 122.4"

Is this indicating there are NO EVENTS at all on the network, including encrypted calls and channels without a frequency assignment? Or could these events actually be occurring? I don't know how to go about debugging this problem.

I see RID 662 [EMSBASE] (presumably the dispatcher) says something for 2s. 19s later, RID 695 [U48P] (presumably unit 48) registers with the system, either just turning their radio on or entering the coverage area. 77s later, a third radio – RID 676 [U47F] (presumably unit 47) – says something for 2s. Three different radios. Unit 48 doesn't seem to say anything, or you didn't decode it, after it registers (the second entry).

 

[dave3825]

Some areas are dispatching via computer aided dispatch. Is it possible they send the nature and address over a cad of some sort? Do you have a scanner to listen with?

Are you parked on the single freq or running a scan list and scanning?