ROLM 90623B Clock Synch Module Circuit Card 98D0111

( Brand: Rolm ), ( Manufacturer Part Number: 90623B ), ( Part Type: Circuit Clock Module Card ), ( Material: Plastic )

Review ROLM Clock Synch Module Circuit Card Used Tested Cleaned

The **ROLAND ROLM 90623B-98D0111 Clock Synchronization Module Circuit Card** is a high-precision, enterprise-grade hardware component designed to ensure seamless and reliable time synchronization within complex telecommunications and data networking environments. Part of the robust **ROLAND ROLM 90623B** series, this module is engineered to maintain strict temporal alignment across distributed systems, critical for applications requiring precise timing coordination, such as VoIP networks, IP telephony, financial transaction processing, and mission-critical data centers. Built with industrial-grade reliability, the circuit card integrates advanced clock synchronization protocols, including **Synchronous Optical Networking (SONET), Synchronous Digital Hierarchy (SDH), and Precision Time Protocol (PTP, IEEE 1588)**, to deliver sub-microsecond accuracy, ensuring minimal latency and synchronization drift in high-speed, high-density networks. Its modular design allows for easy integration into larger telecommunication infrastructure, such as **ROLAND ROLM s Digital Multiplex System (DMS) or other carrier-grade switching platforms**, where consistent timing is essential for call processing, signaling, and data synchronization. The module features a robust **clock recovery and distribution mechanism**, capable of synchronizing to multiple reference sources, including **GPS-disciplined oscillators, atomic clocks, or network-based time servers**, while maintaining redundancy and failover capabilities to prevent downtime. Its compact yet durable construction, with high-quality surface-mount components and shielded connections, ensures resistance to electromagnetic interference (EMI) and environmental fluctuations, making it suitable for deployment in demanding environments such as central offices, data centers, or remote telecom sites. Whether used in legacy telephony upgrades, modern IP-based networks, or hybrid infrastructures, this clock synchronization module serves as a cornerstone for maintaining operational integrity, minimizing jitter, and maximizing the performance of time-sensitive applications.

The **ROLAND 90623B 98D0111 Clock Synchronization Module** (also known as the **98D0111 Clock Sync Card**) is a specialized hardware component designed for telecommunications systems, particularly those using the **ROLAND 98D0111** or similar digital cross-connect (DCS) platforms. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a ROLM 90623B 98D0111 Clock Sync Module**

1. **Compatibility with Legacy Systems**

The module is designed specifically for the **ROLAND 98D0111** and related systems, ensuring seamless integration with existing infrastructure. This is particularly valuable for organizations maintaining older telecommunications networks where replacement parts may be difficult to source.

2. **Reliable Clock Synchronization**

Clock synchronization is critical in telecom systems to maintain timing accuracy across circuits, preventing errors in data transmission. This module provides precise synchronization, reducing jitter and phase drift, which is essential for maintaining call quality and network stability.

3. **Support for Multiple Synchronization Sources**

The module typically supports various synchronization inputs, such as **GPS, PTP (Precision Time Protocol), or network-based timing signals**, allowing flexibility in how the system derives its time reference. This adaptability is useful in environments where primary timing sources may fail or need to be switched.

4. **Reduced Downtime and Maintenance Costs**

By providing a dedicated clock synchronization solution, the module minimizes the risk of timing-related failures that could disrupt network operations. This can lead to lower maintenance costs and fewer unplanned outages.

5. **Backward Compatibility with Older Telecom Standards**

Many older telecom systems rely on **stratum clocks (e.g., Stratum 1, 2, or 3)** for synchronization. This module likely supports these standards, making it easier to integrate with legacy equipment without requiring a full system upgrade.

6. **Potential Long-Term Availability**

While newer systems may favor software-defined or virtualized solutions, hardware modules like this remain in demand for legacy systems. If the module is sourced from a reputable supplier, it may have a longer lifespan than proprietary alternatives that become obsolete.

7. **Modular Replacement Option**

For systems where the original clock sync module has failed, purchasing this part as a replacement avoids the need for a full system overhaul, which can be costly and time-consuming.

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### **Cons of buying a ROLM 90623B 98D0111 Clock Sync Module**

1. **Limited Longevity and Obsolescence Risk**

The **ROLAND 98D0111** platform is an older system, and many telecommunications providers have migrated to modern **SDN (Software-Defined Networking), IP-based, or virtualized** solutions. This module may become obsolete as networks evolve, making future upgrades or replacements more difficult.

2. **High Cost Relative to Modern Alternatives**

Purchasing a specialized hardware module for an older system can be expensive, especially when compared to modern **software-based timing solutions** (e.g., PTP over Ethernet) or cloud-based synchronization services. The cost may not justify the investment if the system is nearing end-of-life.

3. **Dependence on Proprietary Hardware**

Unlike modern systems that support open standards (e.g., **IEEE 1588 PTP**), this module is tied to a specific vendor (ROLAND/Nortel) and platform. This can create vendor lock-in, making it harder to integrate with newer or third-party equipment.

4. **Maintenance and Training Challenges**

Working with legacy hardware often requires specialized knowledge. Organizations may need to train technicians or hire experts familiar with older telecom systems, increasing operational costs.

5. **Limited Scalability**

The module is designed for a specific system architecture and may not scale well with modern demands for **high-density, virtualized, or cloud-based** networking. Expanding or upgrading the network may require additional hardware that is not compatible with this module.

6. **Potential for Counterfeit or Low-Quality Replacements**

Due to the age of the system, there is a risk of purchasing **counterfeit or refurbished parts** that may not meet original specifications. This can lead to performance issues or premature failure, increasing long-term costs.

7. **Integration Complexity with Modern Networks**

If the system is part of a hybrid network (e.g., mixing legacy and modern components), integrating this module may require additional bridging or conversion hardware, adding complexity and potential points of failure.

8. **Environmental and Compliance Considerations**

Older hardware may not meet **modern energy efficiency standards** or **E-waste regulations**, making disposal or upgrades more cumbersome. Additionally, some regions have restrictions on the use of legacy telecom equipment in new deployments.

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### **Conclusion**

The **ROLM 90623B 98D0111 Clock Synchronization Module** is a **practical and reliable solution for maintaining legacy telecom systems** where timing accuracy is critical. It excels in **compatibility, stability, and specialized synchronization capabilities**, making it ideal for organizations that must preserve older infrastructure without immediate plans for a full upgrade.

However, the **high cost, obsolescence risk, and lack of scalability** make it a less attractive option for modern or expanding networks. If the system is **critical to operations and lacks immediate replacement plans**, the module is a sound investment. Conversely, if the network is **aging or being phased out**, the long-term costs and maintenance burdens may outweigh the benefits.

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### **Recommendation**

- **Proceed with purchase** from a **trusted supplier** (e.g., authorized telecom resellers, eBay Enterprise, or specialized hardware vendors).

- **Verify authenticity** to avoid counterfeit parts, and consider **documenting the module s specifications** for future reference.

- **Plan for a phased upgrade** if possible, begin researching **modern timing solutions** (e.g., PTP-based synchronization) to prepare for future network evolution.

- **Avoid purchasing** unless absolutely necessary, as the costs of maintenance and potential downtime may exceed the benefits.

- **Software-defined timing solutions** (e.g., **IEEE 1588 PTP over Ethernet**).

- **Cloud-based synchronization services** (e.g., **NTP servers with GPS backup**).

- **Modular upgrades** to newer **DCS or SDN platforms** that support modern timing standards.

- **Assess the total cost of ownership (TCO)** factor in not just the purchase price but also **maintenance, training, and future upgrade costs**.

- **Prioritize modern, scalable solutions** that support **open standards** (e.g., PTP, SNMP, or cloud-based timing).

- **Avoid vendor lock-in** by choosing equipment that integrates with **multi-vendor networks**.

- **Conduct a cost-benefit analysis** to determine whether preserving legacy hardware is justified or if an upgrade would provide better long-term value.

Ultimately, the decision depends on **the criticality of the system, budget constraints, and future network plans**. For **short-term stability in legacy systems**, the module is a viable choice. For **long-term growth and efficiency**, investing in modern timing solutions is the better strategic move.

Details:

The Rolm brand ensures quality and durability in electronic equipment supplies, making this product a valuable addition to any system requiring precise clock synchronization. The Rolm 98D0111 / 90623B Clock Synch Module Circuit Card is a reliable and tested electronic component that used for clock synchronization purposes. With two rows of plastic material, this circuit card is designed for industrial and business applications.

part #: 90623b price

• $279.99

specifications pcbemdev:

• brand: Rolm
• mpn: 90623b
• part type: Circuit Clock Module Card
• material: Plastic

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• type: Calculated
• carrier: USPS
• cost: $9.81
• transit: 5-11 Days
• class: Standard
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• options: Ship-to-home
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• quantity: 1
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• started: March 6, 2026
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• Electronic Components Semiconductors > Circuit Boards Prototyping > Printed Circuit Boards PCBs
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