TDS-2 and TDS-6 Time Distribution Server modules

The TDS-2 and TDS-6 Time Distribution Server modules provide high quality global time synchronization signals for up to 20 DAG cards. (Up to 14 DAG cards in a dense 1U rack mount package).

All Endace DAG products are equipped with a standard time synchronization input port, with which the internal clock may be synchronized to an external time standard. When synchronized to an external standard, such as a GPS or CDMA time receiver, the timestamps of packets captured on different physical DAG cards may be accurately compared; for example: packets captured from both directions of a full-duplex link, or packets captured from geographically remote locations. These highly accurate timestamps can be used for QoS monitoring applications, bandwidth measurement, traffic engineering, and one-way packet delay and jitter measurement over long distances.

The TDS-2 requires an external time source, and accepts RS422 input from a Trimble Acutime™ Gold GPS receiver, or RS232 input from an Endrun Technologies™ Praecis Ct CDMA time source. Two identical time synchronization outputs are available via RJ45 sockets on the face-plate. When additional time synchronization outputs are required, the TDS-2’s capacity may be expanded six outputs at a time by attaching as many as four further TDS-6 units without compromising timing accuracy.

One TDS2 with the maximum number of TDS-6 expansion units can provide a total of 20 time synchronization outputs derived from a single external time standard via conventional Ethernet style (RJ45) patch cables. Each time synchronization output is independently driven, and cable runs up to 4000 feet (1200m) to each DAG card through existing UTP (Ethernet style) infrastructure are possible.

The TDS-2/TDS-6 is not a network device, does not require an IP address or any on-going administration, and should never be attached to any Ethernet equipment.