ISM321A-20

Manufacturer reference

Manufacturer details describe the cited version. Confirm the exact unit and intended system.

Product type

1000Base-BX WDM Bi-Directional Industrial SFP Module

Standards and Protocols

IEEE 802.3z,TCP/IP

Wave Length

Tx: 1550 nm; Rx: 1310 nm

Power Supply

3.3V

Fiber Type

9/125 µm; Single-mode

Max. Cable Length

20 km

Data Rate

1.25 Gbps

Connector

LC Simplex

Regulatory Compliance

FCC, CE

Environment

Operating Temperature: -40˚C~ 85˚C (-40˚C~ 185˚F); Storage Temperature: -40℃~85℃ (-40˚C~ 185˚F); Operating Humidity: 5%~85% non-condensing; Storage Humidity: 5%~85% non-condensing

Hardware Features (supported)

DDM, SFP-MSA, Hot Swappable

Dimensions (W × D × H)

2.2*0.5* 0.4 in (56.4*13.4*11.0 mm)

Package Content

ISM321LA-20; Installation Guide

Selection notes

• Specifications are from the manufacturer's official product page.
• ISD stock, price, Malaysian warranty and delivery are confirmed separately. Confirm the exact model suffix and supplied revision.

Official documents

• ISD datasheet (PDF): TP-Link ISM321A-20
• TP-Link official source

Manufacturer source checked 2026-11-02. The supplied unit and local terms require confirmation.