TSEC/KY-68 DSVT, commonly known as Digital Subscriber Voice Terminal, is a US military ruggedized, full- or half-duplex tactical telephone system with a built-in encryption/decryption module for secure traffic.
![](http://up.wiki.x.io/wikipedia/commons/thumb/8/8d/KY-68.nsa.jpg/220px-KY-68.nsa.jpg)
![](http://up.wiki.x.io/wikipedia/commons/thumb/0/02/US_Military_KY-68_phone.jpg/200px-US_Military_KY-68_phone.jpg)
It transmits voice and data at 16 or 32 kbit/s, converting voice to a digital signal. The KY-68 can operate via civilian and military switches in either encrypted or un-encrypted mode, or point-to-point (encrypted mode only).
Although used primarily for secure communications, the KY-68 can also transmit to a Digital Non-secure Voice Terminal (DNVT). A local switch warns the KY-68 user with a tone signal when initiating communication with a non-secure terminal.
The KY-68 is keyed using an Electronic Transfer Device, typically either a KYK-13 or AN/CYZ-10.
An almost identical office version (KY-78) features the same electronics as the KY-68, but has an exterior casing composed of lighter materials.
The KY-68 and KY-78 are approved for use with SECRET-classified information.[citation needed]
See also
editExternal links
edit- Jerry Proc's page on the KY-68
- The Signal Leader's Guide — Field Manual 11-43