4 Apr
2021
4 Apr
'21
10:31 p.m.
Use case when the call contains two `Geolocation` headers.
Example
```
Geolocation: <http://example.org/held-link>
Geolocation: <cid:7607331117@10.3.90.20>
```
Technically such a call contains Geolocacation by_value and does not require deference
first Geolocation header by_reference.
From my point of view.
When used
`emergencyRouting` routing need to prefer Geolocation by_value. This alow delivered call
with minimal delays but maybe with low accuracy.
When used `emergencyDispatch` routing needs to prefer Geolocation by_reference. This alow
send HELD request to a mobile carrier and get latest mobile device location.
Technically on Kamailio maybe used `emergencyRouting` and on `PSAP` used
`emergencyDispatch`.
So as idea, in lost request check the number of present Geolocation headers, if present
more than one header:
1. and used `emergencyRouting` then try search `by_value` Geolocation;
2. and used `emergencyDispatch` then try to search and dereference `by_reference`
Geolocation.
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