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Configuring Cisco SPA122 to be used with a 56K modem

Introduction

We will take on the configuration from the last post where I showed how to configure the Cisco SPA122 to be used with a landline phone, and we will modify it to be used with a US Robotics 56K Faxmodem instead of a landline phone.

Say we have a US Robotics 56K Faxmodem installed and connected on a Windows 98 PC. We now want to establish a connection to the Internet using this modem and our phone line.

image.pngNetwork diagram for this lab

SPA122 configuration for its use with a modem

We will begin by making the following changes on the Voice > Line 1 menu configuration (supposing we have connected the phone line to PHONE 1 port on the ATA:

  • Jitter Buffer Adjustment: no
  • Make Call Without Reg: yes
  • Ans Call Without Reg: yes
  • Call Waiting Serv: no
  • G729a Enable: no
  • FAX V21 Detect Enable: no
  • FAX CNG Detect Enable: no
  • FAX Codec Symmetric: no
  • FAX Passthru Method: None
  • FAX Process NSE: no
  • FAX T38 ECM Enable: no
  • Modem Line: yes
  • Echo Canc Enable: no

Click Submit

After this changes are made, we are ready to test it to connect to Internet on the Windows 98 PC.

Sources:

Configuring SPA122 ATA For Dial-Through
https://gekk.info/articles/ata-config.html

 

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