Phone?

[KC2UGV]

If I was a missionary in Africa on a tax-free vacation, so I could get free sat phone-like service.

[WØTKX]

https://en.wikipedia.org/wiki/Duplex...ommunications)

A duplex communication system is a point-to-point system composed of two connected parties or devices that can communicate with one another in both directions, simultaneously. An example of a duplex device is a telephone. The people at both ends of a telephone call can speak at the same time, the earphone can reproduce the speech of the other person as the microphone transmits the speech of the local person, because there is a two-way communication channel between them.

A half-duplex (HDX) system provides communication in both directions, but only one direction at a time (not simultaneously). Typically, once a party begins receiving a signal, it must wait for the transmitter to stop transmitting, before replying (antennas are of trans-receiver type in these devices, so as to transmit and receive the signal as well).An example of a half-duplex system is a two-party system such as a walkie-talkie, wherein one must use "Over" or another previously designated command to indicate the end of transmission, and ensure that only one party transmits at a time, because both parties transmit and receive on the same frequency.
A good analogy for a half-duplex system would be a one-lane road with traffic controllers at each end. Traffic can flow in both directions, but only one direction at a time, regulated by the traffic controllers.

[kb2vxa]

Don't look now but you can do full duplex autopatch if you modify your rig to operate like the 150MHz VHF mobile phones did.

FYI, whomever wrote what is quoted above is confused, that describes simplex; transmitting and receiving on the same frequency while half duplex is the way a transceiver works into a repeater. That is to say transmitting on one frequency and receiving on another but only one at a time, while the repeater operates in full duplex mode. Oh not for you old buzzards, this is for the newbies in need of elmers.

[K7SGJ]

Don't look now but you can do full duplex autopatch if you modify your rig to operate like the 150MHz VHF mobile phones did.

FYI, whomever wrote what is quoted above is confused, that describes simplex; transmitting and receiving on the same frequency while half duplex is the way a transceiver works into a repeater. That is to say transmitting on one frequency and receiving on another but only one at a time, while the repeater operates in full duplex mode. Oh not for you old buzzards, this is for the newbies in need of elmers.

Yuuuuuuup. That's the glue that binds us.

[WØTKX]

Not exactly. https://en.wikipedia.org/wiki/Simplex_communication

ANSI definition: One way signaling[edit]

According to the ANSI definition, a simplex circuit is one where all signals can flow in only one direction. These systems are often employed in broadcast networks, where the receivers do not need to send any data back to the transmitter/broadcaster.
Examples[edit]

• Commercial radio and television broadcast (not two-way radio such as walkie-talkies)
• Garage door openers
• Baby monitors
• Wireless microphones
• Radio controlled models
• Public address systems
• Surveillance cameras
• Pagers
• Communication between a mouse or a game controller and a computer
• Internet multicast
• Radio navigation beacons and radiolocation services such as GPS
• Telemetry

ITU-T definition: One way signaling at a time[edit]

According to the ITU-T definition, a simplex circuit is one where signals can flow in only one direction at a time. At other times communications can flow in the reverse direction. A more common term for this application is half-duplex. Examples are intercoms, and two way radios such as walkie-talkies, citizens band, and mobile radios used dispatch police, firefighters, and taxicabs.
The old Western Union company used the term simplex when describing the half-duplex and simplex capacity of their new transatlantic telegraph cable completed between Newfoundland and theAzores in 1928.[1] The same definition for a simplex radio channel was used by the National Fire Protection Association in 2002.[2]

Next, we'll discuss Nietzsche's narcissism of small differences.





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[K7SGJ]

Not exactly. https://en.wikipedia.org/wiki/Simplex_communication



Next, we'll discuss Nietzsche's narcissism of small differences.





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Followed closely by Eddie's 3rd corollary (or coronary) of IDGAF.

[WØTKX]

Oh, you care. You show it by your post(s). ;)

[W4GPL]

I over simplified to avoid exactly this..

The fact is, in most ham applications, when the radio operator is transmitting, the person on the other end of the phone can't yell "shut up, you already told me about your inflamed hemorrhoids.." and expect the radio operator to hear it.

[K7SGJ]

:chin:

Oh, you care. You show it by your post(s). ;)

Speaking of posts, that reminds me, I have to go fix the gate where the connex delivery dude backed his semi into it last Thursday. True story. It is really twisted and FU.
Of course, that could also describe some of the inhabitants here, too. :chin:

[WØTKX]

I over simplified to avoid exactly this..

The fact is, in most ham applications, when the radio operator is transmitting, the person on the other end of the phone can't yell "shut up, you already told me about your inflamed hemorrhoids.." and expect the radio operator to hear it.

Actually, that's an advantage at times. Like when doing tech support over the phone, and hitting the mute button so you can make comments that will not be heard on the other end. You KNOW you've done it, you SYSOP from hell, you! :stickpoke: