MSD transfer Clause Samples

MSD transfer. SEND START NACK ACK (may be HL-ACK (immediately)  Send initiation signal (5 * “SEND” bursts) from IVS eCall modem to PSAP  eCall modem synchronisation in PSAP  Request MSD by PSAP eCall modem to IVS eCall modem (n * “START” bursts)  eCall modem synchronization in IVS  IVS eCall modem: MSD transmission to PSAP eCall modem (“MSD tx”), potentially in several repetitions, until link layer “ACK” is received from PSAP or “HL-ACK” is received from PSAP (“ACK” may be omitted completely).  PSAP eCall Modem: Send link layer “NACK”, until CRC successful  PSAP: Link layer error check  PSAP: Link layer ACK from PSAP eCall modem to IVS eCall modem  PSAP: Sends “HL-ACK” immediately after “NACK” and “ACK” (“ACK” may be omitted), if format check is successful.