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# Grade of Service

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• #33435 Reply
asad
Guest

thanks Ki. sig load is Link Load = ((MSU*6 + SIO/SIF Octets)*8) / ( 64000*3600)
i fail to understand why (MSU*6 + SIO/SIF Octets). MSU is a complete message consisting of SIO-SIF amongst other flags???

#33436 Reply
samina
Guest

kindly let me know if there is any relation with BHCA and Erlang load. i want to plan for the links eddition by forcasting the BHCA and also the current erlang load with is almost 28.8%/link on IN platform

#33437 Reply
T Ramakrishna
Guest

How are you? Please tell me the formula for this.. Minutes calculation from traffic report.

1 Erl is 1 Channel occupied for 60 minutes.

The following is from the traffic report.
72 Erl 185 Channels in one hour (60 minutes)
How many minutes all the channels are occupied?

I have the following

Observation duration = 60 minutes
Number of Circuits / Channels = 185
Traffic in Erlang = 72.

I want to find out how many minutes all the channels are occupied?

Please tell me the formula.

Best regards,

Ramakrishna

#33438 Reply
cerebrum
Guest

The answer is:
60[min]x72[Erl] = 4320 min

N.B!You must also know that measured Erlangs cannot exceed the number of circuits.

#72633 Reply
Althaf
Guest

Hi,
i wanna calculate Gos for TETRA system. Required Gos is 0.01 with the following parameters:
1. Total available traffic Trunk channels 11
2. Max. number of Tallk Groups 09
3. Total users – 275,
4. Max queuing time – 3sec
plz share Erlang C calculation sheet

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