TTK, or TransTelekom (ТрансТелеКом), is a Russian telecommunication company. It operates a large fiber-optic network that is laid along Russia's railroad tracks, and the Russian State Railways are a major shareholder. Yesterday, October 6, it unveiled a new corporate identity, based on an idea of a "communication window", realised as a titled square. The logo is accompanied by a tagline which translates into "Look at the world from a different angle".
The Russian branding agency VMKR is credited with the rebrand. They have previously worked with Russian Railways.
The previous colourful logo was introduced in 2008, when the company decided to primarily refer to itself by its abbreviation rather than its full name.
TTK press release (archive)
TTK Volga (archive)
On the previous logo