[Asterisk-Users] MGCP Transaction identifiers

[Karl Brose]

The criteria are published in RFC 3435, range is from 1 to 999,999,999.  
there is no requirement
of starting from 1.  Call agents may allocate certain ranges for certain 
groups of gateways.
Asterisk (the call agent) simply increments the id numbers monotonically 
for each new request.
Most likely the gateway (your phone) will do something like that too.  
My MGCP gateways are
hardly ever turned off so the sequence numbers will get higher too.



Leonardo J. Tramontina wrote:

> I know this is not the most appropriated list to this, but I will try:
>  
> Does anyone know what is the criteria to the generation of the 
> transaction identifiers in MGCP? I mean, are they generated by a 
> randomic method?
> I'm using Asterisk and MGCP eyeP Phone and observed that the RSIP and 
> NTFY (methods created by the gateway) use high values in the 
> transaction identifiers, while the RQNT, AUEP, CRCX and DLCX (by the 
> call agent) use low values for it.
>  
> I hope I could explain my doubt! Here are some examples:
>  
> RSIP 18696 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> RQNT 8 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> AUEP 9 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> RSIP 27232 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> RQNT 3 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> NTFY 27219 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> CRCX 2 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
> DLCX 26 aaln/1 at tramontina <mailto:aaln/1 at tramontina> MGCP 1.0
>  
>  
> Thanks,
>  
> Leonardo J. Tramontina
>
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