Invalid response received by Response Received?
Transmit Phase C hangup codes 30 / Unspecified transmit Phase C hangup codes 33 / DTE -> DCE data underflow Transmit Phase D hangup codes 40 / Unspecified Transmit Phase D error 41 / RSPREC error 42 / No response to MPS repeated 3 times (TPHD) 43 / Invalid response to MPS (TPD) 44 / No response to EOP repeated 3 times (TPHD) 45 / Invalid response to EOP (TPHD) 46 / No response to EOM repeated 3 times (TPHD) 47 / Invalid response to EOM (TPHD) 48 / Unable to continue after PIN or PIP Receive Phase B hangup codes 50 / Unspecified Receive Phase B error 51 / RSPREC error (RPHB) 52 / COMREC error (RPHB) 53 / T2 time-out, page expected but not received (RPHB) 54 / T1 time-out after EOM received Receive Phase C hangup codes 60 / Unspecified Receive Phase C error 61 / EOL not received in proper time. T.4 limits the transmission time of a coded line to 5 seconds (Section 3.2 of T.4). If a line exceeds this limit, the receiver should hangup. 63 / DCE -> DTE buffer overflow 64 / bad CRC (ECM or B
