According to Aastra, the reason why calls may cut off during speech may be because it uses the "status-inquiry check" to ensure the conversation is ongoing. This inquiry must be replied to with a "status" message or else the BusinessPhone will drop the call. Some systems use an inferioir "ping", but since it only tests Layer 3 and not the application layer, the BusinessPhone requires an H.223 RAS Status Inquiry.
Note a similar issue between an Asterisk and an MD110:
https://issues.asterisk.org/jira/browse/ASTERISK-18748
The BusinessPhone uses H.323 v4 and supports H.245 tunneling (Annex M.1).
3 comments:
know how to change the frequency of dect DT390.
Or, how to load a new firmware36
know how to change the frequency of dect DT390.
Or, how to load a new firmware
know how to change the frequency of dect DT390.
Or, how to load a new firmware
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