Shortly after the Cuban Missile Crisis, the Kennedy White House installed a teletype hotline to be used as a direct link between the heads of Washington and Moscow. It was created on 20 June 1963, and announced to the public on 30 August of that same year.
This device was used for the first time during the 6 Day War of 1967, when Lyndon B. Johnson communicated with Soviet Premier Alexsei Kosygin. Leaders would type their messages in their native languages, and the received communications were then translated.
No, one of these was never used as part of the Kremlin hotline. This one was from the Carter era, probably part of the Defense Red Switch Network.
The teletype system was which was replaced by facsimile units in 1988. Since 2008 the Moscow–Washington hotline has been a secure computer link over which messages are exchanged by email.
The Old Wolf has spoken, and the NSA is listening.