Cisco MGX 8200 Series Edge Concentrators

Cisco 8-Port T1-E1 MPSM for the Cisco MGX 8800 Series Switches

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The Cisco® 8-Port T1/E1 Multiprotocol Service Module (MPSM) is an 8-port T1 or E1, single-height service module for use in the Cisco MGX® 8800 Series switches and the Cisco MGX 8200 Series edge concentrators. The MPSM delivers connectivity from DS-0 to T1/E1 speeds. It supports the same functions as the 8-port Frame Relay service modules (FRSMs), ATM user service modules (AUSMs), and Circuit Emulation service modules (CESMs) currently deployed and is meant to be a replacement for these cards. The new service module also supports additional features listed in the following section.


• Any-service any-card (ASAC) function, which reduces operation and deployment costs because one MPSM card can act as a FRSM, AUSM, or CESM

• Built-in bit-error-rate-test (BERT) testing

• Inverse Multiplexing over ATM (IMA) 1.0 and IMA 1.1 along with IMA Restart capability

• Support for multiple ATM frame sizes from 32 to 256 bytes

• Independent Transport Clock (ITC) and Common Transmit Clocking (CTC) clocking modes

• Support for FRF 8.1 Frame Relay-to-ATM service interworking

• Mixed-mode 1:N redundancy support to ease sparing requirements

• Hitless replacement and upgrade for current 8-port FRSM, AUSM, and CESM service modules*

Not fully compatible with MGX-CESM-8T1/B.


Table 1 gives ordering information for the Cisco 8-Port T1/E1 MPSM.

Table 1. Ordering Information for Cisco 8-Port T1/E1 MPSM

Product Number



8-port T1/E1 MPSM


8-port T1 RJ-48 backcard


Redundancy backcard, supporting 8-port T1 MPSM


8-port E1 RJ-48 backcard


Redundancy backcard, supporting 8-port E1 MPSM


8-port E1 Subminiature (SMB) backcard


Redundancy backcard, supporting 8-port E1 MPSM


ForeSight or standard available-bit-rate (ABR) license for Frame Relay services on the Cisco 8-port T1/E1 MPSM

To order your Cisco 8-Port T1/E1 MPSM and appropriate license, go to: ( login is required to view this content)

User Documentation

As of August 2004, user documentation for Cisco MPSM licensing is in Appendix F of the "Cisco MGX 8850 (PXM1E/PXM45), MGX 8950, MGX 8830, and MGX 8880 Configuration Guide, Release 5," at
Additional information about Cisco MPSM cards is under the Cisco MGX product listings at htm, starting with "Release 5."


Physical Layer Interface

Table 2 gives technical specifications of the Cisco 8-Port T1/E1 MPSM.

Table 2. Technical Specifications of Cisco 8-Port T1/E1 MPSM

Type of Backcard



Port speed

1.544 Mbps

2.048 Mbps

Cell transfer delay

3623 cells/sec

4528 cells/sec (G.704), 4830 cells/sec (clear channel)

Number of physical ports on MPSM cards



Number of ports on backcards



Line coding

Binary 8-zero substitution (B8ZS) or alternate mark inversion (AMI)

High-density bipolar three (HDB3) with AMI

Line framing

ANSI T1.408 Super Frame (ESF) format line framing

ITU-T G.704 16 frame multiframe line framing and clear channel

Port media

100-ohm twisted-pair or 75-ohm co-axial

120-ohm twisted-pair

Port connector


RJ-48, SMB

Cell mapping






ATM Layer

• Configurable for IMA trunk or User-Network Interface (UNI) application

• Conformant to ATM Forum UNI 3.0 and 3.1 specifications and ITU-T I.361 and I.432 specifications

• Supports up to 16 classes of service (CoSs) and includes all ATM Forum traffic type services: ABR, unspecified bit rate (UBR), non-real time variable bit rate (VBR-nrt), real-time variable bit rate (VBR-rt), and constant bit rate (CBR); supports ABR for explicit forward congestion indication (EFCI), RM marking, and ER stamping; supports IP quality of service

• Supports ABR with virtual source and virtual destination

• Supports early packet discard (EPD) and partial packet discard (PPD)

• Supports Weighted Random Early Detection (WRED)

• Supports per-virtual circuit queuing for traffic scheduling

• Supports per-virtual circuit traffic shaping on egress

• Supports per-virtual circuit policing

• Supports 32 virtual interfaces on egress

• Supports virtual path termination

• Supports Integrated Local Management Interface (ILMI) 4.0

• Complies with standard usage parameter control (UPC) per ATM Forum UNI 3.x, TM 4.0, and ITU-T I.371

• Supports virtual circuit connections (VCCs) and virtual path connections (VPCs)

• Supports virtual-path-identifier (VPI) and virtual-circuit-identifier (VCI) range for VCCs and VPCs per UNI 3.1

• Supports virtual circuit merge for egress and multipoint connections

• Supports usage policing on all interfaces

Frame Relay

• Supports ITU-T Q.933 Annex A, ANSI T1.617 Annex D, and Local Management Interface (LMI) local management for semipermanent virtual circuits (both UNI and Network-Network Interface [NNI] portions); enhanced LMI provides autoconfiguration of traffic management parameters for attached Cisco Systems® routers

• Supports Frame Relay-to-ATM network interworking (FRF 5) and Frame Relay-to-ATM service interworking (FRF 8 and FRF 8.1), both transparent and translation modes, configured on a per-permanent virtual circuit (PVC) basis

• Supports standards-based committed-information-rate (CIR) policing, tagging, and discarding

• Supports end-to-end ForeSight rate-based flow-control option to improve trunk use and user goodput

• Supports capability to extend ForeSight closed-loop congestion management between two Cisco networks across Frame Relay-UNI or Frame Relay-NNI using ANSI T1.618 consolidated link-layer management (CLLM) messages

• Supports Cisco IOS® Software enhancements to Frame Relay-to-ATM service interworking to allow interworking for a wider range of protocols

• Each logical port independently configurable as Frame Relay UNI or Frame Relay NNI

• Meets ANSI T1.618, using 2-octet headers


• Supports ATM Forum Frame Relay-based UNI (FUNI) mode 1A

• Supports interpretation of CCITT-16 cyclic redundancy check (CRC) at end of the frame (frame discard if in error)

• Supports ATM Adaption Layer 5 (AAL5) mapping of user payload to ATM

• Supports 16 VPI values (15 plus the zero VPI); supports virtual path connections (VPCs) for all nonzero VPI values (up to 15 VPCs)

• Supports 64 VCI values

• Supports operation, administration, and maintenance (OAM) frame and cell flows

• Supports standards-based UPC

• Supports end-to-end ForeSight rate-based flow-control option (licensed option)

Circuit Emulation

• The Cisco 8-Port T1/E1 MPSM supports standards-based AAL1.

• The Cisco 8-Port T1/E1 MPSM is compliant with ATM Forum Circuit Emulation Service Version 2.0 (CESv2.0).

• The Cisco 8-Port T1/E1 MPSM offers a choice of structured data transfer (SDT) or unstructured data transfer (UDT) per physical interface.

• Time slots must be contiguous for n x 64-kbps fractional T1/E1 service.

• Any n x 64-kbps channel can be mapped to any virtual circuit

• The Cisco 8-Port T1/E1 MPSM supports T1 cards up to 192 DS-0 ports (24 channels x 8 lines) operating simultaneously with each interface configurable as a single port (UDT) or up to 24 ports (SDT) running at full line rate at n x 64 kbps.

• The Cisco 8-Port T1/E1 MPSM supports E1 cards up to 248 DS-0 ports (31 channels x 8 lines) operating simultaneously with each interface configurable as a single port (UDT) or up to 31 ports (SDT) running at full line rate at n x 64 kbps.

• The Cisco 8-Port T1/E1 MPSM offers a choice of partially filled AAL1 cells per virtual circuit.

• The Cisco 8-Port T1/E1 MPSM supports Super Frame and Extended Super Frame (ESF) framing modes.

• The Cisco 8-Port T1/E1 MPSM supports synchronous clocking for both UDT and SDT.

• The Cisco 8-Port T1/E1 MPSM supports asynchronous clocking for UDT, with synchronous residual time stamp (SRTS) and adaptive clock recovery methods.

• The Cisco 8-Port T1/E1 MPSM supports ON/OFF hook detection and idle suppression using channel-associated signaling (CAS).

• The Cisco 8-Port T1/E1 MPSM allows the choice of per-virtual circuit partially filled AAL1 cell payload to improve cell delay. Type fill range (bytes):

– T1 structured: 25-47

– T1 unstructured: 33-47

– E1 structured: 20-47

– E1 unstructured: 33-47

• The Cisco 8-Port T1/E1 MPSM supports per-virtual circuit queuing in both directions and per-virtual circuit traffic shaping in the egress direction.

• The Cisco 8-Port T1/E1 MPSM supports Private Network-Network Interface (PNNI) Preferred Routing for switched permanent virtual circuits (SPVCs).

• The Cisco 8-Port T1/E1 MPSM supports customer edge-to-customer edge and customer edge-to-ATM SPVC endpoints.

• The Cisco 8-Port T1/E1 MPSM supports xPVC Cisco WAN Manager as well as PVC (portable AutoRoute [PAR]) support for feeder nodes.


• Greater than 100,000 hours mean time between failure (MTBF)

Physical Specifications

• Dimensions: (H x D): 7.25 x 15.83 in.

Electrical Specifications

• Input power required: (48 VDC)

• Power consumption: 36W

Electrical and Safety Standards Compliance

• EMI/ESD compliance

– FCC Part 15

– Bellcore GR1089-CORE

– IEC 801-2

– EN55022

• Safety compliance

– EN 60950

– UL 1950

• Bellcore Network Equipment Building Standards (NEBS): Level 3 compliant