T840 Carrier-Grade Clock Server

Learn about our T840 Telecom Grandmaster

Next-generation telecommunications networks and critical infrastructure demand higher accuracy, stability, and scalability in time synchronization. The T840 is a carrier-grade, enhanced grandmaster clock platform that integrates ePRTC, PRTC, SSU, and IEEE 1588v2 grandmaster clock functionality. It supports PTP, NTP, SyncE, and multiple interface protocols, including BITS, IRIG-B, 1PPS, and 10MHz. The T840 features a modular design, synchronization monitoring, and interference mitigation capabilities, allowing for flexible deployment in the core network, aggregation layer, or edge nodes. Combined with built-in Syncprobe™ technology and a multi-source holdover algorithm, the T840 is the most reliable timing investment platform for the transition from traditional to IP networks.

Important Features

Our T840 is a high-precision time synchronization platform that integrates ePRTC, PRTC, SSU, IEEE 1588v2 grandmaster, NTP, and SyncE. It supports multi-scenario deployment in carrier core, aggregation, and edge networks, meeting the synchronization needs of telecommunications, power, broadcasting, and high-precision industrial sectors. Key features of the T840 include:

Supports multiple modes including ePRTC, PRTC A/B, SSU, PTP, NTP, boundary clock, slave clock, APTS, etc.
Compatible with BITS, E1, 2M and other interfaces, it facilitates smooth evolution from TDM to IP networks.
Supports multi-band GNSS and BeiDou reception, and has anti-interference and soft spoofing detection algorithms.
The ePRTC time source fusion function can connect to up to four phase and frequency sources to achieve redundancy protection and fault tolerance.
Built-in Syncprobe™ technology provides synchronization quality monitoring, testing, and fault tolerance capabilities.
Supports up to 40 1G/10G interfaces, with optional 25G/40G/100G/200G to meet large-scale clock distribution needs.
It can support multi-source cross-validation input and identify and shield abnormal reference signals.
It also supports NTP, PTP, SyncE and related protocol profiles to meet the needs of communications, power, industry and other applications.
Supports security enable/disable, encryption, access control and timing protocol protection mechanisms.
It provides hot standby hardware, supports multi-board expansion, and ensures system-level reliability.

Product Highlights

The T840 adopts a modular design and supports multiple modes such as ePRTC, slave clock, boundary clock, NTP/SSU, etc., meeting the needs of high reliability and flexible timing.

With multi-source input and cross-validation capabilities, it can effectively improve time reference redundancy and enhance the ability to resist GNSS interference and spoofing.

Supports up to four phase and frequency reference inputs, enabling the construction of a high-reliability redundant system in ePRTC applications.

Built-in Syncprobe™ synchronization monitoring technology enables visualization, automatic detection, and fault-tolerant switching of time synchronization quality.

Provides up to 40 1G/10G high-density output interfaces, suitable for large-scale network synchronization deployment.

Supports Class D (5 nanosecond) high-precision timing, meeting the stringent timing accuracy requirements of 5G backhaul and industrial networks.

Supports PTP, NTP, SyncE multi-protocol output, adapting to complex scenarios such as power, finance, and industrial Internet.

Product Key Benefits

Keep performance selected

We offer three high-precision oscillator options—OCXO, dual-oven DOCXO, and a built-in rubidium atomic clock—to meet the timekeeping requirements of various scenarios. Even when GNSS signals are interrupted or subject to spoofing interference, the system can maintain stable timing, ensuring the continuity of critical services that rely on UTC.

Flexible architecture

The T840 utilizes a modular, high-performance hardware platform based on a domestically produced processor architecture, supporting flexible deployment and expansion. The base model offers a rich set of interfaces, including 16 Gigabit Ethernet ports, 8 Gigabit optical ports, 4 10G SFP+ optical ports, and inputs for E1, 2M, PPS/ToD, IRIG-B, 10MHz, 1MHz, and BeiDou GNSS. Optional hot-swappable expansion modules support 10G/25G/40G/100G/200G network cards and SATA secure storage, adapting to diverse timing needs.

Elasticity

The T840 supports dual power supply redundancy, multi-frequency BeiDou III reception, and a highly stable local oscillator, effectively resilient to complex environments such as signal interruption, interference, and spoofing. The platform's built-in intelligent holdover algorithm and multi-source input switching logic ensure nanosecond-level time accuracy even in the event of GNSS signal loss. The redundancy mechanism, through coordinated software and hardware, enables automatic failover, supporting millisecond-level switchover from backup to active, ensuring uninterrupted timing for critical systems.

Security

The T840 clock server adheres to leading industry AAA security standards and supports authorization, authentication, and accounting mechanisms based on TACACS+, RADIUS, and two-factor authentication. The device supports the IEEE 1588 version 2.1 (2019) security specification and integrates comprehensive security hardening features, including password complexity requirements, access control list (ACL) management, and known Common Vulnerability (CVE) vulnerability remediation and protection. Using multiple security protocols, including HTTPS, SSH, SNMPv3, and RADIUS/TACACS+, the T830 provides trusted, controllable, and auditable security for critical timing systems.

Enhanced Primary Reference Time Clock (ePRTC)

The T840 supports ePRTC mode enabled by software licensing, enabling enhanced high-precision timing without requiring additional hardware modifications. In ePRTC mode, the T830 meets ITU-T G.8272.1 requirements, achieving a phase accuracy of ±10 nanoseconds. When operating in conjunction with a standard cesium clock (such as the 5071A or a domestically produced cesium clock), it forms a long-term, interference-resistant time reference system.

Secure and accurate time under zero-trust architecture

The T830 high-precision time server serves as an enterprise's "trusted time foundation," providing secure, verifiable, and auditable time assurance within a zero-trust architecture. By integrating a Beidou trusted source, a highly stable local oscillator, and refined security control mechanisms, the T830 meets the core requirements of a zero-trust architecture, including user identity, device access, network boundaries, and behavioral analysis, providing accurate, reliable, and traceable time support for various data operations.