This read-only INTEGER reports the Information Transfer Capability used for this connection, distinguishing speech(2), a non-data voice-style connection, from data-mode connections like audio31(6) and audio7(7). An admin checks this to confirm a WAN connection negotiated the expected data-mode bearer capability rather than accidentally negotiating as a voice call. For example, a connection expected to carry data traffic that instead reports speech(2) here would explain why the data session over that connection failed to establish properly.