Cisco IP SoftPhone 1.3.4a was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The Cisco IP SoftPhone installer is commonly called CiscoIPSoftphone.exe.
The program lies within Communication Tools, more precisely Instant messaging. We recommend checking the downloaded files with any free antivirus. The most popular version of the Cisco IP SoftPhone is 1.3. This free program is a product of Cisco Systems, Inc.
From the developer:
The Cisco IP SoftPhone is an advanced, state-of-the-art communications application for your laptop or desktop PC. Enabled by Cisco AVVID (Architecture for Voice, Video
and Integrated Data), the Cisco IP SoftPhone is a powerful voice-over-IP (VoIP) software application that is fully integrated with the Cisco Systems line of IP telephones.
You may want to check out more software, such as Cisco IPS Manager Express, Cisco IP Communicator or VTGO-PC Multilab Softphone, which might be related to Cisco IP SoftPhone.