In order to achieve higher data rates and better voice quality via IP technology, all base stations must be synchronized with high accuracy, a maximum time deviation of 5 µs. For the conversion to IP, a large part of the old infrastructure will be retained. Some of the base stations will be equipped with new hardware to become IP-compatible. However, since all base stations themselves are not PTPv2 compatible, a PTP slave (DTS 4020.timebridge) can be used. The PTP slave (DTS 4020.timebridge) is converting the PTP signal to ToD (Time of Day + 1pps) compatible with the base stations. The DTS 4020.timebridge transmits the 1PPS / 10MHz and ToD signal in the required CCSA (China Mobile) format to the base station and achieves an accuracy of < +/- 100ns in the laboratory (Tested with a radio link).
- DTS 4020 is a PTP Slave according to IEEE 1588 for high precision synchronization. In existing network infrastructure it provides a low cost upgrade enabling migration from a TDM to packet based timing and synchronization (e.g. Ethernet backhaul).
- The high performance DTS 4020.timebridge can reply to more than 10'000 NTP and SNTP requests per second, which allows for the synchronization of several thousand clients.
- The DTS 4020 supports NTP authentication for increased security, which allows the clients to verify the source of the received NTP packets.
- Operation over LAN via MOBA-NMS (SNMP), SSH or SNMP protocols is possible. SSH and SNMP (MD5 authentication and DES for encryption) enable a secured connection.
- Alarms are reported via SNMP messages, e-mail or by alarm relay. Additionally, the alarm is indicated on the Alarm LED.