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Cisco MGX 8200 Series Edge Concentrators

Cisco MGX-CESM-T3/E3

 

Data Sheet

Cisco MGX-CESM-T3/E3 Circuit Emulation Service Modules


The Cisco MGX-CESM-T3/E3 Circuit Emulation Service Modules (CESMs) are designed for use with the MGX 8230 and MGX 8250 multiservice gateways, the MGX 8800 series wide-area edge switch and the BPX® 8680 universal service node product lines. This service module offers high-speed circuit services over an ATM backbone for the new world of data networking. Growth for clear-channel T3/E3 circuit services has outpaced all other types and speeds of leased-line offerings.

The new world of networking will require support for circuit services across an IP+ATM packet-switched backbone. The CESM provides this capability using standards-based adaptation of circuit interfaces onto ATM. The MGX-CESM-T3/E3 provides one port of high-speed T3 or E3 unstructured data transfer (UDT) circuit services on a single, seven-inch function module.

The CESM-T3E3 provides direct connectivity to one T3 or E3 line for full-duplex communications at the DS3 rate of 44.736 MHz or at the E3 rate of 34.368 MHz. Each T3 or E3 line consists of a pair of 75-ohm BNC coaxial connectors, one for transmit data and one for receive data, along with three LED indicators for line status.

Ordering Information

MGX-CESM-T3E3(=)

One T3 or E3 Circuit Emulation Service Module

MGX-BNC-2T3(=)

Two T3 75-ohm BNC back cards for CESM T3E3, top port is used

MGX-BNC-2E3(=)

Two E3 75-ohm BNC back cards for CESM T3E3, top port is used




Highlights

CESM cards support circuit emulation services using standards-based adaptation layers over ATM. The CESM-T3E3 uses AAL1 for T3 or E3 unstructured transfer mode operation, per the ATM Forum's Circuit Emulation Specification, Version 2.0.

  • Programmable egress buffer size and CDV tolerance settings are supported for flexible support of jitter and latency requirements.

  • Bit count integrity is maintained when AAL1 lost-cell condition is detected.

  • The CESM card provides ingress/egress data and signaling trunk conditioning per VC as per ATM Forum CES V2.0.

  • T3/E3 CESM cards can be Y-cabled to provide 1:1 hot standby redundancy of the CESM.

  • CESM cards are supported by standards-based management tools, including SNMP, TFTP (for configuration/statistics collection), and a command-line interface. The Cisco WAN Manager and CiscoView tools also provide full graphical user interface support for connection and equipment management.

Features

Physical Layer

T3 Interfaces

  • One DSX-3 (44.736 Mbps +/-40 ppm) interfaces with dual female 75-ohm BNC coaxial connectors per port (separate RX and TX)

  • B3ZS line coding

  • Pulse shape conforming to ANSI T1.102

  • T3 bit error rate tester (BERT) and extended loop-up, loop-down pattern generation and verification

  • 1:1 redundancy with Y-cabling for T3 CESM cards of the same type

  • LOS alarm detection/generation support

  • Transmitter loop-timed to receiver or synchronized to shelf

E3 Interfaces

  • One G.703 (34.368 Mbps +/-20 ppm) interface with dual female 75-ohm BNC coaxial connectors per port (separate RX and TX)

  • HDB3 line coding

  • Pulse shape conforming to ITU G.703

  • E3 BERT and extended loop-up, loop-down pattern generation and verification

  • 1:1 redundancy with Y-cabling for E3 CESM cards of the same type

  • LOS alarm detection/generation support

  • Transmitter loop-timed to receiver or synchronized to shelf

General Card Information

Indicators

  • Per card: Active (green), standby (yellow), fail (red)

  • Per line: Active and OK (green), active and local alarm (red), active and remote alarm (yellow)

Maintenance/Serviceability Features

  • Internal problem isolation loopbacks

  • Hot pluggable

Reliability

  • > 100,000 hours MTBF

Card Size

  • Front cards: 7.25 x 16.25 in.

  • Back cards: 7.0 x 4.125 in.

Power

  • -48 VDC, 32.45W

Temperature Range

  • 0-50oC (32o-122oF)