Products : SSX-3000 Chassis
SSX-3000 Chassis Overview
The SSX is based on an ATCA chassis. The choice of ATCA simplified the development of the SSX, offering a standard form factor that is highly scalable, designed from the beginning for high availability, and steeped in important regulatory standards such as NEBS.
The SSX 3000 has 5 slots. All components in the SSX chassis can be implemented redundantly and are hot swappable to eliminate downtime associated with hardware failures. System MTBF is 275 years (~2.5m hours) and the SSX has been independently verified to offer 99.999% uptime even with an MTTR of 24 hours.
To view SSX-3000 chassis specifications click here.SSX-3000 Feature Highlights
Scalability
Mobile broadband is a sea change for mobile infrastructures when is comes to scalability. Dimensions of scale for network elements that worked for mobile voice do not work for IP data services on today's 3G networks, nor for the 4G migration on the horizon. Total supported subscribers remains an importnat metric, however the industry is shifting from per subscriber throughput measured in tens of kilobits per subscriber, to 100s of kilobits per subscriber. And this will only increase with data services adoption, as more compelling mobile stations and applications emerge, and as HSPA+, LTE all IP networks are rolled out. The SSX is provisioned with best-in-class throughput per subscriber capacity.
In addition to the change in scale of throughput dimensions for managing mobile broadband, is scalability of session management functions. In the SSX, throughput, subscribers, and services all scale linearly. No more sizing gymnastics, trading off subscriber density and throughput for functionality. The SSX-3000 is provisioned to deliver line rate services – including IPSec encyption/decryption – for all functions and for all 240,000 subscribers.
The diagram to the right illustrates the scaling of active subscribers and traffic management service classes for the Gigabit Line Card (GLC). The colored boxes labeled "Control" and "Visibility" highlight the granularity of the SSX-3000's traffic management capabilities. As mobile data subscribers continue flock to operator and Internet-based meta-applications or mashups, fined grained visibility and control become critical to meeting subscriber and partner service delivery expectations. Stoke has recently announced a new card in the SSX family, the XGLC20. Targeting more centralized deployments and Evolved Packet Core applications, the XGLC20 delivers up to 6 times more capacity and throughput than the GLC
High Availability
With a goal of continuous system operation SSX hardware was designed from the beginning to exceed demanding carrier requirements for availability and reliability. SSX high availability features and functions include:
- IP Management Cards can be implemented redundantly;
- There is dedicated hardware for routing on the IMCs and several subsystems for packet forwarding and processing on each GLC. The two functions are separated so one subsystem does not affect the other during peak load events;
- Non-stop forwarding is supported whereby packet forwarding continues through switchover from primary to secondary IMCs;
- Packet forwarding, all aspects of packet processing, and encryption are fully distributed, rare failure events are isolated to a fraction of the system;
- Hot swappable components – Line Cards, Power Entry Modules, and Fans;
- All external interfaces have provisions for redundant configurations.
Green Operations
While the SSX is specifically engineered to help fixed, mobile and Internet-based operators realize the economic benefits and competitive advantages of network convergence, the platform delivers exceptional value towards green networking initiatives as well, including:
- High performance, low power– The SSX delivers high performance forwarding and session management capabilities for as low as a few hundred watts of power;
- Small form factor, lots of subscribers– A single SSX-3000 can support up to 240,000 subscribers in a compact 5RU chassis;
- Multi-function and Virtualized– The SSX-3000 consolidates multiple networking functions into a single system, reducing the number of discreet boxes. The SSX can also be virtualized to fulfill multiple roles in the network concurrently, further reducing space and power requirements;
- RoHS compliance – The SSX is in full compliance with the EU directive for "the restriction of the use of certain hazardous substances in electrical and electronic equipment".
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