IEEE 1588v2 PTP Grandmaster Clock
Key Customers
Mobile Communication Providers
Power Industry/ Rail Industry
ISP Service Providers/ Transmission Network

Basic Informations

Model IS2000/2000A
Type IEEE 1588v2 PTP Grandmaster Clock
Compliance IEEE 1588v2-2008, ITU-T G.8275.1/2, etc.
Clients 64/128/256/512
Applied Fields 4G/LTE-FDD/TDD, LTE-Advanced Networks
Ethernet Backhaul Networks
WiMAX Backhaul Networks
Passive Optical Network(PON)
Electric Power Network:Substation
Size 340mm(W) x 259mm(D) x 44mm(H), 1U

Product Overview

Telecommunications and Precision measuring equipment require high precision timing (sub micro second unit), in order to acquire valid remote data and process data reliably. Therefore, users relied heavily on GPS for processing precision timing, and materialized it through Ethernet network.

As a relation between Ethernet networks, IEEE 1588v2 PTP (Precision Time Control) is set as technology to process high precision time synchronization, and correct errors within the network. This technology operates GrandMaster equipment as a main, and synchronizes it to slave module, which is inside a receiver, that requires time synchronization.

This product is GrandMaster equipment that provides precision timing and frequency to slave modules that users are equipped with. This product provide dualizing function as a preparation for network instability by supporting alternative master function, and is equipped with function to transfer GNSS synchronized clock through ESMC (Ethernet Synchronization Messaging Channel) in order to synchronize with SyncE equipment.

Edge Master IS2000 at Small Cell Network

Purpose of this product is to provide synchronized precision time and frequency to 4G/LTE small cell network at an economical price

Product Description

  • Dualization for stable network

    Carrier class network requires protection clock for stable management. Through optimized Master Clock Algorithm embodied by IEEE1588v2, this product makes reliable operation possible in network and main equipment. Primarily, slave equipment selects Grand Master by QL value, and then selects Grand Master under standard of G.8275.1 and G.8265.1, which is designed to protect equipment, and make reliable operations possible.
  • Hybrid mode

    This product synchronizes Frequency, Phase and ToD (Time of Day) separately. Frequency is synchronized on physical layer, and Phase and ToD synchronization is separated from PTP. Such hybrid mode solves problems from populated network hubs, and provides high degree of time precision.
  • Mixed-mode PTP communication

    As a default, ITU-T G.8265.1 suggests Unicast PTP method, but Mixed-mode PTP method can be used as an option to decrease heavy network load. Mixed-mode PTP is a mixture of Multicast downstream (Sync, Announce), and Unicast (Del_Req, Del_Res).This product provides all communication methods listed below:
    • Unicast Mode
    • Multicast Mode
    • Mixed Mode

Product Features

  • IEEE1588v2-2008 Precision Time Protocol(PTP) GrandMaster clock
  • Block to GNSS(GPS or GLONASS) input signal, PRTC
  • Economic deployment in the mobile small cells network
  • Edge GrandMaster deployment to avoid backhaul noisy, and packet network asymmetry
  • Alternate master based on IEEE1588’s BMCA
  • Hybrid operation with IEEE1588 and SyncE protocols
  • Unicast, Multicast, and Mixed-mode for PTP
  • Designed to support the future ITU-T G.8275.2 profile for small cell synchroni-zation
  • Support the various number of clients : up to 512/256/128/64 clients
  • Hardware-based PTP packet processing, No performance degradation and accuracy
  • Synchronous Ethernet interface as master
  • 100/1000Mbps combo style interface (copper & fiber)
  • 10MHz, 1PPS and ToD output
  • DC or AC power by factory option
  • WEB UI, and CLI management
  • SNMP

Applied Fields

  • 4G/LTE-FDD/TDD, LTE-Advanced networks
  • Ethernet backhaul networks
  • WiMAX backhaul networks
  • Passive Optical Network(PON)
  • Electric power network : substation

Compliance Standard


  • IEEE1588v2-2008
  • IEEE802p LAN Layer2 QoS/CoS Protocol


  • ITU-T G.812
  • ITU-T G.8261, G.8262, G.8265.1
  • ITU-T G.8275.1, G.8275.2(Ready)
  • ITU-T G.8264
  • ITU-T G.781


  • RFC 792
  • RFC 2474
  • RFC 2616


GNSS Input

  • Factory option : GPS/SBAS or GLONASS IF
  • Connector : 50Ω SMA [Female]
  • Voltage feed to GNSS antenna : 5Vdc±5%


  • Case size : 340 x 259 x 43.6 mm (W x D x H)
  • 1U rack mountable (Rack: 19 or 23 inch)


  • Operating temperature : 0~50ºC
  • Operating humidity : 0~90 %
  • RH non-condensing
  • Storage temperature : -40 ~ +70ºC

Power Supply

  • Factory option : AC or DC input
  • AC input : 90~264Vac, 50Hz/60Hz
  • DC input : -38.4 ~ -72Vdc
  • Power consumption : Max 30W

Time and Frequency Accuracy

  • Accuracy under locked to GNSS at operating temp
  • Time : < 100ns
  • Frequency : 1 x 10-11 (ITU-T G.811)
  • Holdover Accuracy (over constant temperature)
  • Time : < 8us/day (G.812)
  • Frequency : < 1 x 10-11/day (G.812)

I/O Port in Front Panel

  • AC option : IEC60320 C14 socket
  • DC option : 1776692 (MSTB 2,5/2-GF),  Phoenix
  • Monitoring
  • - 1PPS output : 50Ω SMA [Female]
  • - 10MHz clock output : 50Ω SMA [Female]
  • CLI : RS232, RJ45
  • Management : 10/100Mbps Ethernet, RJ45
  • PTP interface : 100M/1000Mbps Ethernet Combo
  • - Combo Style : Copper RJ45 and Fiber SFP
  • GNSS input : 50Ω SMA [Female]
  • LEDs : 2 x 3 row, 1 x 2 row

Monitoring Output

  • 10MHz Clock : Sinusoidal, disable by configuration
  • 1PPS : +3.3V LVTTL, disable by configuration
  • MON : Test port for production testing

Network Support

  • VLAN (802.1Q, 802.1p), Q-in-Q
  • IPv4 DSCP
  • ICMP (RFC792)
  • Hybrid operation :
  • - Frequency synchronization : SyncE
  • - Phase and ToD synchronization : IEEE1588v2
  • SNMP v2c, v3 for NMS

IEEE1588v2 PTP Interface

  • Client capacity : 64 clients, basic
  • Client expanding : 128, 256, 512 by soft license
  • Up to 128 PTP messages per second per client
  • PTP over IPv4
  • 1 or 2 step PTP mode
  • Best Master Clock Algorithm (BMCA), with de-
    fault profile. Supporting Alternate Master
  • Unicast, Multicast, and Mixed-mode for PTP
  • IEEE1588v2 PTP End-to-End, and Peer-to- Peer
  • Hardware-based PTP packet processing. No
    performance degradation as clients capacity 
  • Fully comply with IEEE1588v2-2008 standard
  • Support ITU-T G.8275.1 Telecom Profiles

Synchronous Ethernet

  • Transmit Frequency through SyncE PHY of PTP 
    port as a master to the next hop
  • Conforms to ITU-T G.8261, G.8262, and
    G.8264 Ethernet Synchronization Message Channel (ESMC)


  • CLI
  • WEB base Management, Web UI
  • Telnet for Remote System Control
  • Remote Software Upgrade
  • DTMF Output / Alarm Port : IS2000A only