---
title: "Modem & Serial I/O"
type: "article"
slug: "modem-serial-i-o"
url: "http://localhost/article/modem-serial-i-o/"
markdown_url: "http://localhost/article/modem-serial-i-o.md"
published_at: "2026-03-12T23:41:27+00:00"
modified_at: "2026-03-12T23:41:28+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "A review of the Byte-Back MD-1 modem with RS232C serial port ($119.95 kit/$149.95 assembled), covering its features and connection to the ZX/TS 1000."
category:
  - name: "Sinclair Users Network"
    slug: "sinclair-users-network"
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post_tag:
  - name: "Byte-Back Co"
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  - name: "Hardware review"
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    url: "http://localhost/tag/hardware-review/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Lawrence Kelly"
    slug: "lawrence-kelly"
    taxonomy: "indiv"
    url: "http://localhost/indiv/lawrence-kelly/"
publication_r:
  id: 21559
  title: "Sinclair Users Network"
  type: "periodical"
  url: "http://localhost/periodical/sinclair-users-network/"
authors_r:
  - name: "Lawrence Kelly"
    slug: "lawrence-kelly"
    taxonomy: "indiv"
    url: "http://localhost/indiv/lawrence-kelly/"
volume: "2"
issue: "1"
issues_articles:
  - id: 26557
    title: "Sinclair Users Network January 1983"
    type: "issue"
    url: "http://localhost/issue/sinclair-users-network-january-1983/"
pages: "8"
pubdate: "January 1983"
product_reviews:
  - id: 13338
    title: "MD-1 Modem"
    type: "product"
    url: "http://localhost/product/modem/"
archive_link: false
---

# Modem & Serial I/O

A review of the Byte-Back MD-1 modem with RS232C serial port ($119.95 kit/$149.95 assembled), covering its features and connection to the ZX/TS 1000.