Acme1100 + KDDI Hikari Direct(SIP)
When we checked with KDDI about the settings for the connection between Acme1100 and KDDI SIP circuit (Hikari Direct), we only got the following response.
Is there any info on your side?
KDDI's answer follows ★.
① SIP Message Specifications:
We would like to confirm the format of the URI and the header rules within SIP messages. Specifically, we are interested in the specifications related to headers such as "From", "To", and "P-Asserted-Identity".
★Please note that the specifications of SIP messages cannot be disclosed to customers. We appreciate your understanding.
② SDP Constraints:
We would like to confirm whether there are any constraints regarding the usable codecs (e.g., G.711, G.729) and the DTMF standard (e.g., RFC2833).