AS-PROTOCOL-for-legacy-mode {itu-t(0) recommendation(0) t(20) t128(128) version(0) 2 as-protocol-for-legacy-mode(2)}
 AS-PROTOCOL-for-PER-encoding {itu-t(0) recommendation(0) t(20) t128(128) version(0) 2 as-protocol-for-per-encoding(1)}
  - GCC-PROTOCOL {itu-t(0) recommendation(0) t(20) 124 version(0) 2 gcc-protocol(0)}