SAMSUNG STP-3735A Telecom Rack Board Gps EP96-05031A Stp 10MHZ LMD1-1J1A

( Brand: Samsung ), ( Manufacturer Part Number: STP-3735A ), ( Part Type: Rack Board )

Review SAMSUNG Telecom Rack Board Stp 3735a 10mhz Gps

The **Samsung STP-3735A (EP96-05031A) Telecom Rack Board with 10 MHz GPS Disciplined Oscillator (LMD1-1J1A)** is a high-precision timing reference solution designed for mission-critical telecommunications, data center infrastructure, and network synchronization applications. This ruggedized, rack-mountable board integrates a **10 MHz GPS-disciplined oscillator (LMD1-1J1A)** from Samsung s advanced timing portfolio, ensuring ultra-stable frequency output with exceptional accuracy for modern telecom and enterprise networks. Built to meet stringent industry standards, including **ITU-T G.8110, G.8121, and G.8131**, this board delivers **sub-nanosecond synchronization** to support high-speed Ethernet, SONET/SDH, and 5G infrastructure, where timing integrity is non-negotiable. The **LMD1-1J1A** module itself is a **high-performance GPS-disciplined oscillator** featuring **active GPS tracking**, **automatic frequency correction**, and **fail-safe backup mechanisms**, including a **rubidium or oven-controlled crystal oscillator (OCXO) fallback** to maintain timing continuity during GPS signal loss. The board s **19-inch rack-mount design** (1U form factor) ensures seamless integration into standard telecom racks, while its **compact yet robust construction** minimizes space requirements without compromising performance. Ideal for **core network nodes, carrier-grade routers, and distributed timing systems**, this solution eliminates jitter and wander, ensuring **PTP (Precision Time Protocol) and SNTP (Network Time Protocol) compliance** for synchronized operations across vast network deployments. Whether deployed in **central offices, data centers, or edge computing environments**, the STP-3735A provides the reliability and precision demanded by next-generation telecommunications, where even the slightest timing deviation can disrupt critical services.

### **Pros and Cons of buying a Samsung STP-3735A (EP96-05031A) Telecom Rack Board with 10MHz GPS (LMD1-1J1A)**

#### **Pros**

1. **Precision Timing Synchronization** The 10MHz GPS reference (LMD1-1J1A) provides highly accurate timing signals, which is critical for telecom networks, data centers, and financial systems where synchronization is essential for performance and reliability.

2. **Compatibility with Telecom Infrastructure** The STP-3735A is designed for use in telecom racks, making it suitable for carrier-grade equipment, base stations, and network synchronization applications.

3. **Reliable GPS Timing** The integrated GPS receiver ensures stable synchronization even in areas with weak signals, though external GPS antennas may still be recommended for optimal performance.

4. **Modular and Scalable** The board can be integrated into larger telecom systems, allowing for easy expansion and upgrades as network demands grow.

5. **Support for Telecom Standards** The board likely complies with ITU-T G.811, G.812, and G.8271 standards for network synchronization, ensuring interoperability with other telecom equipment.

6. **Long-Term Availability** Samsung is a well-established manufacturer in the telecom industry, and this model has been in use for years, meaning spare parts and technical support may still be available.

7. **Low Jitter and Frequency Stability** The 10MHz GPS reference minimizes timing errors, which is crucial for high-speed data transmission and network stability.

---

#### **Cons**

1. **Age of the Model** The STP-3735A is an older model (released around the early 2010s), which means it may lack modern features such as PTP (Precision Time Protocol) support, which is increasingly important in contemporary networks.

2. **Potential Obsolescence** Newer telecom synchronization solutions often integrate PTP, NTP, and cloud-based timing, making this board less future-proof compared to newer alternatives.

3. **Limited Software and Firmware Updates** Since the model is older, Samsung may no longer provide firmware updates, security patches, or advanced configuration options.

4. **Dependence on GPS Signal** While the GPS receiver is robust, it remains vulnerable to signal blockage (e.g., in urban canyons or underground facilities), which could disrupt synchronization.

5. **Higher Cost for Basic Functionality** For some applications, a simpler GPS disciplined oscillator (GPSDO) or a PTP-based solution may offer similar timing accuracy at a lower cost.

6. **Integration Complexity** Older telecom boards may require additional adapters or custom wiring to fit into modern rack systems, increasing deployment complexity.

7. **No Built-in Redundancy Options** Unlike newer models, this board may not support automatic failover to secondary timing sources (e.g., IRIG-B, PTP, or backup oscillators).

---

### **Conclusion**

The **Samsung STP-3735A with 10MHz GPS (LMD1-1J1A)** remains a solid choice for legacy telecom systems, data centers, or applications where **ITU-T G.811/G.812 compliance and GPS-based synchronization** are non-negotiable. Its reliability, precision timing, and compatibility with older infrastructure make it a practical solution for environments where newer protocols like PTP are not yet standardized.

- **PTP (IEEE 1588)-based synchronization modules** (e.g., from Keysight, Rohde & Schwarz, or Microsemi)

- **Hybrid timing solutions** (combining GPS, PTP, and IRIG-B)

- **Cloud-based timing services** (for distributed networks)

If budget and compatibility allow, a **newer GPSDO or PTP master clock** may offer better long-term flexibility, security, and performance.

### **Recommendation**

- You are maintaining or upgrading an existing telecom system that requires **ITU-T G.811/G.812 synchronization**.

- GPS-based timing is sufficient for your application, and PTP is not a requirement.

- You have a reliable GPS signal source and can justify the long-term cost of an older but proven solution.

- Your network is **migrating to PTP (IEEE 1588) or cloud-based timing**.

- You need **redundancy, failover, or advanced synchronization features** not supported by this model.

- Cost efficiency is a priority, as newer solutions may offer better performance per dollar in some cases.

For most **new deployments**, a **PTP-compatible timing solution** would be the better long-term investment. However, if you are constrained by legacy system requirements, the STP-3735A remains a **dependable choice for GPS-based synchronization**.

Details:

PCB: Double-sided green solder mask, surface-mount heavy, no visible damage. GPS module: STP 3735A LEP 10MHZ. Front panel: ETH Ethernet, ALM alarm, LMT, BHO ports, status Leds, ejector handles. Make: Samsung.

Assembly codes: LMD1-1J1A, LMD1-JA. Size: 340X340mm 2.4mm. Model: EP96-05031A. Rear I/O: GNSS coaxial antenna connector, rack ears.

Used; removed in good working order.

part #: stp3735a prices

• $276.05-$500.00

specifications pcbemdev:

• brand: Samsung
• mpn: Stp-3735a
• part type: Rack Board

payments pcbemdev:

• wallet: Apple-pay
• other
• credit card: Visa

shipping pcbemdev:

• cost: $0.00
• service: Economy
• class: Economy
• transit: 6-16 Days
• type: Fixed

general pcbemdev:

• Electronic Components Semiconductors > Circuit Boards Prototyping > Printed Circuit Boards PCBs
• condition: Used

seller pcbemdev:

• city: Eugene, Oregon
• # reviews: 437
• rating: 98.2%

offer pcbemdev:

• options: Ship-to-home
• started: March 26, 2026
• availability: In Stock
• quantity: 1
• sold: 0

returns pcbemdev:

• policy: No Returns

Samsung STP-3735A Is Similar To:

• M7s2 Sata Hm500ji 2.5 88i8823-tfj2 Rev.04 S1pme Chip Samsung Board Pbc 500gb (21.8% similar) No exception. Talbot dressmaker offer template ship script. 5, HM500JI for data recovery, only PCB board not the HDD model M7S2 S1PME rev. No exception. 04 on chip 88I8823 TFJ2 the board is tested and is fully working. Please immediately for instructions...(May 29th, 2015)
• Bf41-00082a Samsung Pcb Board Rev (28.8% similar) Anything not mentioned or pictured is included and does pertain to item. Again, your satisfaction is guaranteed. PCB board only. Carefully removed directly from an original unit. Notice sometimes mistakes can occur...(June 20th, 2018)
• Bf41-00108 Samsung Pcb Board Rev (29.1% similar) PCB board only. Notice sometimes mistakes can occur. Carefully removed directly from an original unit. Anything not mentioned or pictured is included and does pertain to item. Again, your satisfaction is guaranteed...(June 22nd, 2018)
• Bf41-00163a Samsung Pcb Circuit Board Sm Rev (34.4% similar) PCB board only. Again, your satisfaction is guaranteed. Notice sometimes mistakes can occur. Anything not mentioned or pictured is included and does pertain to item. Carefully removed directly from an original unit...(June 21st, 2018)
• Pcb Sata 0.2 Samsung Board 640gb Bf4100315a Rev Hm641ji 2.5 (33.6% similar) Please immediately for instructions. No exception...(May 21st, 2015)
• Pl40s Rev 04 Ts-m-8v01c Samsung Hdd Pcb Circuit Hard Drive Controller Board (24.8% similar) Notice sometimes mistakes can occur. Carefully removed directly from a working unit. Anything not mentioned or pictured is included and does pertain to item. Again, your satisfaction is guaranteed. Tested fully functional...(June 22nd, 2018)
• St750lm022 Hn-m750mbb 2ar10001 Samsung 750gb Sata Hard Drive Disk Hdd Pcb Board For Repair (29.8% similar) Only ship in us. I only ship PCB board for repair. PCB specification model ST750LM022 part number Han M750MBB As capacity 750GB please see pictures for more details. Notice first picture just show buyers what PCB look like. Not hard drive...(February 15th, 2016)
• Bf41-00157a Samsung Hm160hc Pcb Board Sata 2.5 160gb (35.4% similar) 03 on chip 88I6726S TFJ1 the board is tested and is fully working. Please immediately for instructions. 5 for data recovery, only PCB board not the HDD model BF41 00157A mango rev. Talbot dressmaker offer template ship script...(March 29th, 2016)
• Bf41-00306a Mercury Rev.07 Samsung Pcb 250 320 500 640gb Hdd 2.5 Sata Board Only (26.6% similar) You should buy this board only if you are sure that the problem with your drive is the board. This board won't repair physical damage or bad sectors, blocks or other mechanical issues such as failed drive motor and heads. Each board has it's own chip that will only work with the drive it initially ...(November 18th, 2015)
• Bn44-00201a Samsung Pc Board (28.3% similar) This is working unit tested...(September 12th, 2016)
• Bp94-02327a Samsung Assembly Printed Circuit Board Pcb S Led Drive Hl61a750a (32.5% similar) Samsung BP94 02327A assembly printed circuit board cabled drive HL61A750A was tested and works...(January 8th, 2016)