Hi Denis,
Hi Slava,

On 09/10/2018 01:26 PM, Slava Monich wrote:
Hi Anirudh, Denis at al.

@@ -669,6 +669,10 @@ const char *registration_status_to_string(int status)
          return "unknown";
      case NETWORK_REGISTRATION_STATUS_ROAMING:
          return "roaming";
+    case NETWORK_REGISTRATION_STATUS_REGISTERED_EUTRAN:
+        return "registered lte";
+    case NETWORK_REGISTRATION_STATUS_ROAMING_EUTRAN:
+        return "roaming lte";

What would be the difference between "roaming lte" and "roaming" (or "registered lte" vs "registered") from the viewpoint of D-Bus API clients? In other words, what would e.g. dialer do differently depending on whether registration status is "registered lte" or just "registered"? Is it worth the API break? The existing clients won't know how to handle the new values until they (clients) get updated.


I agree.  That is why I suggested a separate Property for this (and the CSFB case from 27.007) instead of modifying the Status property directly.

E.g. REGISTERED_SMS_EUTRAN would map to Status="registered" and SmsOnly=False.  ROAMING_SMS_EUTRAN would map to Status="roaming" and SmsOnly=True.

I assume that the Dialer can ignore this as the modem will fall back to 3G in case of a call?  Someone feel free to educate me.

The modems I dealt with do drop to 3G for voice calls. Once voice call terminates, they switch back to LTE (well, most of the time). Dialler (at least our dialler) doesn't care about access technology.

Just a thought - could the presence of org.ofono.VoiceCallManager and org.ofono.MessageManager interfaces be used to indicate whether voice calls and/or messaging is available? That wouldn't require any D-Bus API changes at all.

Cheers,
-Slava
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