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8.11 Synchronous Ethernet (SyncE)
With SyncE, devices in an Ethernet Network can synchronize their clock to the
frequency used to transmit the network packets. The DTS 4210 supports SyncE
compatible to ITU G.8262/Y1362. It is available on 12 different network interfaces (see
(see Appendix A Connection diagrams).
The DTS 4210 can be configured to run as a SyncE Master only. It communicates via
the Ethernet ports by sending Layer2 packets (ESMC), with the current quality level
information.
Connectors:
Ethernet via 4x SFP slots and 8x RJ45 ports
referring to Appendix A Connection diagrams.
Transmission mode:
Layer2
Quality Level:
In synchronized state the DTS 4210 sends out the quality level
PRC.
8.12 E1
E1 is a European digital transmission format specified by the ITU-T. The E1 signal
format carries data at a rate of 2.048 Mbit/s. It is composed of 32 channels and the
data rate supported by each channel is 64 kBit/s. The DTS 4210 is equipped with 4 E1
interfaces.
Outputs:
4 unbalance E1 outputs (BNC 75 Ohms TX and RX)
4 balanced E1 outputs (RJ48 jack)
Coded:
HDB3 coding format
Features:
Supports CRC4
DTS 4210 meets the following standard:
G.811: when Rubidium is installed and synchronized with GNSS.
8.13 Oscillator
The DTS 4210 is available with the below mentioned oscillator:
-
Rubidium :
The rubidium oscillator provides the ability to extend the hold-over period for operation
compatible to the G.811 in case off a temporary loss off the time source.
This oscillator is disciplined to the time source available (such as GNSS, PTP, E1…) .
During the start-up, the rubidium oscillator has to warm-up. In this warm-up time the
oscillator is not stable enough. This is the reason why the device waits for the oscillator
to lock/stabilize. This takes normally up to 10 minutes. In the worst case this can take
up to 2 hours, but this is really rare.
For operation with E1 line, the rubidium oscillator is the recommended option.
