Huawei OSN500 TNM1MD1 processing board supports 32 Smart E1 service


SKU: 2014960 Category:


TNM1MD1 Overview

Huawei OSN500 TNM1MD1 processing board supports 32 Smart E1 services.

The functional version of the MD1 is TNM1.


The feature code of the MD1 indicates the E1 port impedance.

Feature codes of the MD1

Feature Code Port Impedance (Ohm)
A 75
B 120


TNM1EM6T Valid Slots

The MD1 can be inserted in slots 3 and 4. The slot allocation priority is as follows: slot 4 > slot 3. The logical slots of the MD1 on the NMS are the same as its physical slots.


TNM1EM6T Technical Specifications

This section describes the board specifications, including the port performance, dimensions, weight, and power consumption.


Mechanical specifications of the MD1

Item Performance
Dimensions (H x W x D) 19.8 mm x 193.8 mm x 205.9 mm
Weight 0.50 kg
Typical power consumption 12.0 W
Maximum power consumption 13.0 W
Function and Feature Board
Basic functions Receives and transmits E1 signals, and supports flexible configuration of E1 service categories.
E1 service categories Supports the following E1 service categories:

  • CES E1
  • ATM/IMA E1
Port specifications Provides thirty-two 75-ohm/120-ohm E1 ports.
ATM/IMA Maximum number of ATM services
  • Local: 32
  • Remote: 64
Maximum number of ATM connections
  • Local: 128
  • Remote: 256
ATM traffic management Supported
ATM encapsulation mode Supports the following ATM encapsulation modes:

  • N-to-one VPC
  • N-to-one VCC
  • One-to-one VPC
  • One-to-one VCC
Maximum number of concatenated ATM cells 31
ATM OAM Supports F4 OAM (VP level) and F5 OAM (VC level), including the following functions:

  • Alarm indication signal (AIS)/Remote defect indication (RDI)
  • Continuity check test
  • Loopback test
Maximum number of IMA groups 32
Maximum number of members in an IMA group 16
CES Maximum number of services 32
Encapsulation mode Supports the following encapsulation modes:

  • SAToP
Service category Point-to-point services
Compression of vacant slots Supported (applicable to CESoPSN only)
Jitter buffering time (us) 375-16000
Packet loading time (us) 125-5000
Maintenance features Loopback Supports inloops and outloops at E1 tributary ports.
Cold reset and warm reset Supported (with warm resets having no impact on services)
PRBS tests at E1 ports Supported
Board manufacturing information query Supported
Board power consumption information query Supported
Hot board swapping Supported
Synchronization CES ACR Supported


Supports CES ACR for a maximum of four channels. The clock information that is recovered from the services transported at ports 1-16 can be sent out only from ports 1-16; the clock information that is recovered from the services transported at ports 17-32 can be sent out only from ports 17-32.

Retiming Supports tributary retiming and system retiming.


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