This read-only value reports which data-framing method, pseudo-framing, HDLC framing, or PPP-async, is being used for the current call's data transport. Admins check this to confirm the session negotiated the expected framing method for its application, since a mismatch can indicate a misconfigured dial-up client or unexpected connection type. For example, an admin expecting a synchronous leased-line style connection but seeing cmmFraming report ppp-async would recognize that call actually established as a standard asynchronous PPP dial-up session instead.