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Radio control protocol
- this page is a stub
CI-V, sometimes denoted CI-5, is a communication interface specification,
or protocol, for the control
of transceivers and receivers, developed in 1991 and maintained by Icom Inc.
in Osaka (Japan).
It is implemented in the majority of radios offered by the company.
It is Icom's fifth communication interface product, hence the name CI-V.
CI-V is also used by other (peripheral) manufacturers.
This page acts as a placeholder for information related to the CI-V protocol.
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CI-V compatible devices on this website
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- CT-17
This interface allows up to four CI-V compatible radios to be controlled
by a Personal Computer (PC). The radios are all connected in parallel
to a 2-wire interface. TXD and RXD lines are interconnected at the radio
side (not at the PC side).
- UX-14
This interface allows an Icom radio with the older CI-IV control protocol,
to be operated by a CI-V compatible system.
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1200 baud 8N1.
1 start bit, 8 data bits, 1 stop bit, no parity, no handshake.
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When multiple radios of the same type are
connected in parallel, each radio must have a unique address in the range
01h to 7Fh, but in practice the range may be limited by the radio.
So far, Icom has only used even addresses. This leaves odd addresses
to be assigned by the user.
Below is a non-exhaustive overview of the known device addresses,
assembled from various sources, including [B] and [2], complemented by
our own observations.
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© Crypto Museum. Created: Saturday 09 August 2025. Last changed: Sunday, 10 August 2025 - 22:25 CET.
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