Model: MC-1-M (2U)
Doc. Ref. no. : m05/om/101
Issue no. 14
User’s Manual
Page 100 of 103
5) If ntp client device is a computer machine based on Windows or Unix based or Linux based,
please refer manual Appendix C for proper configuration and time synchronization method of
client device.
6) Please refer section 11.3.3. and manual Appendix C for understanding NTP client time
synchronization method.
17.13 Loss of time synchronization by NTP Client during GPS Unlock
If NTP client loses time synchronization when GPS Master Clock Model MC-1-M is in Unlock
condition and resume when GPS Master Clock Model MC-1-M comes in LOCK condition, check
the configured NTP stratum value in GPS Master Clock Model MC-1-M device. It should be less
than 15 or applicable value depending on NTP hierarchical architecture arrangement as
explained in section 11.3.3 and 11.3.4.
17.14 Loss of time accuracy in NTP, IRIG-B, event outputs during Unit Power ON in Unlock conditions
When GPS Master Clock Model MC-1-M comes in UNLOCK condition from LOCK condition
during normal operation, unit enters in holdover mode. Refer section 14 for technical explanation
of holdover mode.
17.15 Cannot establish telnet communication
1) IP address of GPS ethernet port and telnet device should be same network domain.
2) Please verify the Ethernet connection between GPS ethernet port and telnet device by
pinging the IP address of GPS ethernet port. If IP address of GPS ethernet port is not
reachable, telnet connection will fail. Refer troubleshooting index 17.10 and 17.11.
3) Provide correct IP address of GPS Ethernet port while trying to establish telnet connection.
Refer manual Appendix E for procedure for telnet connection with GPS Ethernet port.
17.16 Cannot establish SNMP communication
1) IP address of GPS ethernet port and SNMP manager should be in the same network domain.
2) Please verify the Ethernet connection between GPS ethernet port and SNMP manager by
pinging the IP address of GPS ethernet port. If IP address of GPS ethernet port is not
reachable, SNMP connection will fail. Refer troubleshooting index 17.10 and 17.11.
3) SNMP Manager should be able to work on SNMPv1 and SNMPv2c protocol.
4) MIB file at manager side for model MC-1-M agent should be the same provided at the time of
commissioning.
5) Read or Write Community of SNMP manager and model MC-1-M agent should be same.
17.17 Not able to receive SNMP traps
1) IP address of GPS ethernet port and SNMP manager should be in the same network domain.
2) Please verify the Ethernet connection between GPS ethernet port and SNMP manager by
pinging the IP address of GPS ethernet port. If IP address of GPS ethernet port is not
reachable, SNMP connection will fail. Refer troubleshooting index 17.10 and 17.11.
3) SNMP Manager should be able to work on SNMPv1 and SNMPv2c protocol.
