Cisco MGX 8800 Series Switches

Cisco MGX 8850 Multiservice Switch


Table Of Contents

Data Sheet

Scalable Configurations

Network Management

Physical Specifications


Switching Card Options

Network Interfaces

Optional Redundancy

Node Synchronization

Electrical and Safety Compliance

Data Sheet

Cisco MGX 8850 Series

Multiservice Switch

The Cisco MGX® 8850 Advanced ATM Multiservice Switch enables delivery of a complete portfolio of differentiated service offerings while scaling from DS0 to OC-48c/STM-16 speeds.

Based on the industry's most extensible architecture, the Cisco MGX 8850 provides the greatest flexibility at the service provider edge. Multiple, simultaneous control planes support unmatched flexibility and scalability in deploying, managing, and modifying a complete range of ATM, Multiprotocol Label Switching (MPLS), and voice services.

Figure 1

Cisco MGX 8850 Multiservice Switch

Key Features

Full range of Frame Relay, ATM, circuit emulation, voice, and IP services

Scalable from 1.2 to 45 Gbps of nonblocking throughput

Innovative architecture for supporting multiple control planes and dynamic allocation of services mix

Choice of switching fabric for price/performance optimization

Industry's highest network availability

Key Applications

Frame Relay

Frame Relay-to-ATM network interworking

Frame Relay-to-ATM service interworking

IP-enabled Frame Relay


IP virtual private networks (IP VPNs)


DSL aggregation

Circuit emulation

Technical Specifications

Support for permanent virtual circuits/paths (PVCs/PVPs), soft permanent virtual circuits/paths (SPVCs/SPVPs), switched virtual circuits/paths (SVCs/SVPs), label virtual circuits (LVCs), and connectionless routing are all offered on a single platform.

Scalable Configurations

Using the Cisco PXM-1 Processor Switching Module Card option for edge concentration, service providers can deploy a complete set of narrowband services with 1.2 Gbps of nonblocking switching for low-density or remote deployments.

The Cisco PXM-1E Switching Card option adds Private Network-Network Interface (PNNI) routing features to the 1.2-Gbps switching capacity option for lower-density deployments of narrowband services.

Using the Cisco PXM-45 Switching Card option, service providers can implement a complete range of narrowband services for high-density edge applications and broadband aggregation with 45 Gbps of nonblocking switching. The Cisco PXM-45 can also be used exclusively for broadband aggregation and backbone functions.

Network Management

Cisco MGX 8850 is managed by Cisco WAN Manager using Simple Network Management Protocol (SNMP). Cisco WAN Manager provides telecommunications network element management functions, as well as standard network management functions, such as connections management and network topology graphical user interface (GUI).

The Cisco WAN Manager Service Agent can also be used to provide a northbound SNMP Application Program Interface (SNMP API) for seamless integrations with operations support systems (OSSs) and third-party network- and service-management systems. The Cisco WAN Manager Service Agent enables flow-through provisioning and fault-management capabilities that service providers demand.

Mechanical Configuration

32 single-height (16 double-height) function module slots

The single-height slots can be in-service slots converted to double-height slots by removal of midrail dividers

Two double-height slots are reserved for redundant processor switch modules

Four single-height (two double-height) slots are reserved for optional value-added Service Resource Modules

24 single-height (12 double-height) slots for service modules

Physical Specifications

Dimensions: (H x W x D): 29.75 x 17.72 x 21.5 in. (75.6 x 45.0 x 54.6 cm)

Rack-mountable in 19- and 23-in. (48.2- x 58.4-cm) EIA/RETMA and ETSI racks


1.2 or 45 Gbps of redundant, bidirectional, nonblocking throughput

Switching Card Options

1.2-Gbps shared memory fabric (Cisco PXM-1)

1.2-Gbps shared memory fabric (Cisco PXM1-E)

45-Gbps crosspoint fabric (Cisco PXM-45)

Network Interfaces






Channelized T3 (down to DS0)

n x T1/E1


Channelized T1 (DS0)

Channelized E1

High-Speed Serial Interface (HSSI), X.21, V.35

High density mix of OC-3 and T3/E3 ports

Optional Redundancy

All components are optionally redundant to 100-percent system redundancy, including the control processor, IP modules, switching fabric, network interfaces, service interfaces, critical backplane signals, power supplies, power modules, and cooling fans.

Node Synchronization

Internal Layer 3 clock source

External T1/E1 Building Integrated Timing Supply (BITS) source

External source received in band over the network

Synchronization to software-programmable primary and secondary sources, with automatic switchover

Electrical Specifications

Input power required: -48 VDC

Optional AC powering

Typical power consumption: 1000W

Electrical and Safety Compliance

EMI/ESD compliance

FCC Part 15

Bellcore GR1089-CORE

IEC 801-2


Safety compliance

EN 60950

UL 1950

Bellcore NEBS: Level 3-compliant

Optical safety: IEC 825-1 (Class 1)