This reports the ITU-standardized broadband bearer class negotiated for this SVC during call setup -- Class A for constant-bit-rate circuit-mode connections, Class C for connection-oriented variable-bit-rate data, Class X for user-defined AAL parameters, Class VP for virtual-path-level connections -- telling the admin what kind of service the calling application actually requested. For example, an SVC negotiated as class-A(2) alongside an aal1(1) AAL type together confirm this call is carrying constant-bit-rate traffic such as circuit-emulated voice, consistent with both fields describing the same underlying service.