Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
HP JD556A MSR 4 x Ports T1 IMA MIM Network Switch Module
- Provides 4 x T1 IMA ports for WAN connectivity.
- Designed for HP MSR (Modular Services Router) series.
- Supports Inverse Multiplexing over ATM (IMA) protocol.
- Enables aggregation of multiple T1 circuits into a single logical link.
- Facilitates cost-effective WAN bandwidth expansion.
- Suitable for connecting to T1 leased lines or CSU/DSU devices.
We'll confirm the current price and availability for JD556A.
Key specifications
See full specs ↓- Product Type
- Network Switch Module
- Ports
- 4 x T1 IMA
- Protocol
- Inverse Multiplexing over ATM (IMA)
- Compatibility
- HP MSR Series
Product details
The HP JD556A MSR is a network switch module featuring four T1 IMA (Inverse Multiplexing over ATM) ports. This module is designed for the Modular Services Router (MSR) series, enabling the aggregation and termination of multiple T1 circuits for WAN connectivity.
Technical Information
| Product Type | Network Switch Module |
| Ports | 4 x T1 IMA |
Additional Specifications
| Protocol | Inverse Multiplexing over ATM (IMA) |
| Compatibility | HP MSR Series |
Description
The HP JD556A is a specialized network module designed for HP's Modular Services Router (MSR) platform, offering four T1 Inverse Multiplexing over ATM (IMA) interfaces. This module is crucial for organizations that need to aggregate multiple T1 circuits to create a higher-bandwidth Wide Area Network (WAN) connection. IMA technology allows for the combination of several lower-speed T1 lines (each approximately 1.544 Mbps) into a single, more robust logical link, providing increased throughput and resilience for critical data traffic. This module is particularly useful for businesses that rely on T1 leased lines for their primary WAN connectivity but require more bandwidth than a single T1 can offer. By utilizing the JD556A, companies can leverage existing T1 infrastructure and cost-effectively scale their WAN capacity without needing to upgrade to more expensive E1 or higher-speed circuits. The module handles the complexities of IMA, including link aggregation, load balancing, and fault tolerance, ensuring reliable data transmission over the aggregated T1 links. Integration into the HP MSR router allows the JD556A to benefit from the router's advanced routing capabilities and management features. This enables seamless connectivity to various network services and applications over the WAN. The module is designed for environments where stable and predictable WAN performance is essential, such as connecting branch offices to a central data center or providing access to cloud-based services. Its four T1 IMA ports offer flexibility in configuring the aggregated bandwidth based on specific business needs.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for JD556A.



