Symmetricom Time Server user manual Local Time Source Input Reference Identifier String

Appendix A: NTP Version 3, NTPQ, and NTPDC NTP V 3.0 Data Format per RFC-1305

Table A-2 Local Time Source Input

Local Time Source Input	Reference Identifier String
GPS	"GPS"
ACTS	"ACTS"
NTP	"NTP"

Reference Timestamp

The reference timestamp is a 64 bit timestamp format representing the local time at the last update. TimeVault’s reference timestamp is the last time that a valid synchronization source signal was present.

Originate Timestamp

The originate timestamp is a 64 bit timestamp format representing the time that the request left the client host.

Receive Timestamp

The receive timestamp is a 64 bit timestamp format representing the time that the request arrived at the service host.

Transmit Timestamp

The transmit timestamp is a 64 bit timestamp format representing the time that the reply left the service host.

Authenticator

This is a 96-bit field containing the authenticator information as described in Appendix C of RFC-1305. This field is not implemented by TimeVault.

A-94 TimeVault™ User’s Manual 6000-100AppA.fm Rev. C