Cisco® Network Convergence System (NCS) 520 are next-generation Layer 2 and Layer 3 capable, MEF 3.0 Certified, customer-located devices and network demarcation devices for service providers. These 10 Gigabit Ethernet demarcation points redefine the demarcation between the customer LAN and a service provider’s mobile and cloud applications. They provide standards-based demarcation as defined by the Metro Ethernet Forum (MEF) for Carrier Ethernet services such as Ethernet point-to-point line (ELINE) and Ethernet multipoint-to-multipoint (ELAN) services, E-Tree, Access E-Line, Transit E-Line with advanced clocking and Quality of Service (QoS).
The Cisco NCS 520 (Figure 1) is designed to be deployed as a “touchless” Network Interface Device. That means Zero-Touch Provisioning (ZTP) to simplify deployment.
Figure 1. Cisco NCS 520
Product overview
The Cisco NCS 520 comes in a small form factor (1RU) and is fixed, in these configurations:
● Cisco NCS 520 4G4Z-A with an AC power supply, two RJ45 GE interfaces, two SFP GE interfaces, and four dual-rate 1GE/10GE SFP+ interfaces.
Designed for Ethernet demarcation and carrier Ethernet access, the Cisco NCS 520’s differentiating features include:
● Robust device security with features such as TrustAnchor module, secure JTAG, runtime defenses
● Line-rate performance for all Layer 2 interfaces
● Built on a carrier Ethernet Application-Specific Integrated Circuit (ASIC) with critical functions in hardware
● EVC architecture and QoS model as per MEF standards
● Extended operating temperatures
● Dense small form factor: 1RU with 9 in. depth
● Redundant power options
The Cisco NCS 520 provides all the features required for MEF 3.0 service initiation, including services such as ELINE, ELAN, ETREE, ACCESS ELINE, TRANSIT ELINE. To help maintain proper QoS for these services, the Cisco NCS 520 offers rich traffic classification and hierarchical QoS for per-port services. To help ensure that Service-Level Agreements (SLAs) are enforced, ingress traffic policing and egress shaping are also supported.
Cisco NCS 520 system specifications
Description | Cisco NCS 520 Series – 8 Port |
|---|---|
Physical specifications | Height: 1.75 in., 1 RU Width: 12.2 in. Depth: 9 in. Weight: |
Rack mounts | ETSI rack mount kit 19 in. rack mount kit 23 in. rack mount kit |
Power supplies | Single AC power supply Or Dual DC Power Supply |
Chassis MTBF at 40ºC operating temperature | N520-4G4Z-A: 493,000 hours N520-X-4G4Z-A: 454,000 hours N520-X-4G4Z-D: 389,000 hours |
Airflow | Front-to-back airflow |
| Power consumption | Maximum input power for NCS 520 (8 Port) is 70W. This is equivalent to 239 BTU per hr. Maximum input power for NCS 520 (24 Port) is 110W. This is equivalent to 375 BTU per hr. |
| AC input voltage and frequency | Voltage range: 85V AC to 264V AC, nominal 100V to 240V AC Frequency range: 47 to 63 Hz, nominal 50 to 60 Hz |
| DC input voltage | Voltage range: -19.2V DC to -72V DC, nominal -24V DC to -60V DC |
| Fans | 3 Integrated Fans1 |
| Operating Environment | 0 to 55ºC, up to 1,000 feet (300m) 0 to 50ºC, up to 6,000 feet (1800m) 0 to 40ºC, up to 13,000 feet (4000m) GR3108 Class-1 |
| Relative humidity | 5 to 95 percent, noncondensing |
| Noise | 48 dBA at 30ºC (ETSI Desktop Mount - ETSI EN 300 753 V1.2.1 (2009-03)) |
| 74 dBA at highest system performance | |
| Outside Plant | For an outside plant installation, it is required that the system be protected against airborne contaminants, dust, moisture, insects, pests, corrosive gases, polluted air, or other reactive elements present in the outside air. To achieve this level of protection, it is recommended that the unit be installed in a fully sealed enclosure |
| Storage Environment | Temperature: -40 to 70ºC Altitude: 15,000 feet (4570m) |
| Seismic | Zone 4 |
| Hazardous substances | Reduction of Hazardous Substances (ROHS) 6 |