Voice Switch

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Kelsi Corsi

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Aug 3, 2024, 4:17:07 PM8/3/24

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In telecommunications, a voice operated switch, also known as VOX or voice-operated exchange, is a switch that operates when sound over a certain threshold is detected.[1] It is usually used to turn on a transmitter or recorder when someone speaks and turn it off when they stop speaking. It is used instead of a push-to-talk button on transmitters or to save storage space on recording devices. On cell phones, it is used to save battery life. Intercom systems that use a speaker in a room as both a speaker and a microphone will often use VOX on the main console to switch the audio direction during a conversation. The circuit usually includes a delay between the sound stopping and switching direction, to avoid the circuit turning off during short pauses in speech.

Unlike manual push-to-talk (PTT) operation, VOX isautomatic; the user can keep his or her hands free while talking. But VOX also has some significant disadvantages that explain why PTT is still common.

Most VOX circuits have a sensitivity adjustment, but unwanted (and sometimes undetected) VOX triggering can still occur on background noise, heavy breathing or a side conversation. Conversely, it may not activate when desired on speech that is too weak.

The VOX in a two-way radio can also be triggered by the loudspeaker carrying the other side of the conversation. This problem can beminimized with an "anti vox" feature to decrease VOX sensitivity when the receiver is active.

Transmitters and recorders have short but finite activation times thatmay clip the beginnings of phrases. Some modern VOX circuits eliminate this problem by recording or transmitting a delayed version of the input signal. An older way of overcoming this, used by pilots, and astronauts, as some of the first users of VOX, was to habitually preface every transmission with "uh" in place of keying the microphone.

The first is just a best practice to give voice traffic higher QoS, IIRC. The second is required for the device-traffic-class=voice operation to work successfully. The switch needs to see the LLDP info for the phone before it will allow it on the voice vlan. Speaking of which, you need to send back the vlan with the device-traffic-class=voice. VLAN can be named "voice" on the switch, and you can just pass back the name instead of the number.

the phone is finding the correct vlan without dot1x so i believe the lldp part is fine, qos i personally always have my doubts about if it is needed on a regular LAN, not really an issue here anymore. the host-mode command i used was:

Additional Information:

An active Nintendo Switch Online membership is required to use the voice chat features of the Nintendo Switch Online app.
For help determining which games support the Voice Chat feature, please see the full list of compatible titles.
The Voice Chat feature can be used by Nintendo Switch Online members who are age 13 and older.

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On the Cisco switches, not sure how to VLAN the (48) PoE ports and the (2) uplink ports, so the VoIP phones (passing data traffic from a pc through a spare port on back of phone) will pick up the correct voice VLAN 20 and therefore get their correct IP address from DHCP server scope 20.x.

As far as tagged/untagged and access/trunk, can anyone explain, from a conceptual standpoint, what is happening with the CLI steps RPCasama graciously provided. I think it will make sense to me if I can add.a bit of conceptual instruction. Thanks. -ksawyer

Tagged means a VLAN tag has been applied in the TCP header, i.e. the access port is a member of the VLAN specified in the interface config. Untagged means that interface is in the default VLAN and no VLAN number is specified on that interface.

Switchports can be trunks or access ports. Access ports are connected to end point devices like a PC or phone. Trunks are used to connect switches to each other. By default, trunks can carry traffic from any VLAN, unless specifically configured to limit which VLANs are permitted on the trunk. Access ports will typically carry just one VLAN, with the caveat that a single interface can actually carry two if a data VLAN and voice VLAN are specified.

Tagged means a VLAN tag has been applied in the TCP header, i.e. the access port is a member of the VLAN specified in the interface config. Untagged means that interface is in the default VLAN and no VLAN number is specified on that interface.

Hi, I wanted to configure the 2520/2530 switch series with auto voice vlan, similar to what I did with the 1920/1930 office connect.
The scenario is very simple, vlan 1 untagged and auto vlan 100 for the voice, so in the phones I only have to enable the lldp because then the switch tags the packets automatically placing the phone traffic on the vlan 100.

That doesn't sound right! All the gang's voices have been switched around because of an invention malfunction, but with Talking Angela's gig a few hours away the clock's ticking! Will they fix her voice in time?

The episode begins with Tom, Hank and Angela watching Bongo and McGillicuddy when their television switches to Ben talking as he explains his teleportation pad. They are all amazed, and he demonstrates his invention by getting a stapler from his desk. Angela then tries, but when Ben presses the button on his phone that activates the teleporter, Tom jumps on it as well. When they return, Ben and Angela tell Tom that it was a "stupid idea", but when Angela talks, she has Tom's voice and Tom has Angela's. They have been voice swapped.

Ben tries to swap their voices back on his computer, but it doesn't seem to work. Angela is panicking because she really wants her voice back. Then, Tom suggests going back the opposite way they came, but Ben predicts that will only make it worse. Angela is worried that it might be permanent, and Ben says that they will revert to their own voices in a few days, but Angela wants her voice back sooner. Ben says that was impossible, but then he thinks of something. Tom is glad he had Angela's lovely voice, but Angela is disappointed because she is stuck with Tom's.

Hank and Ginger are watching TV when Angela's mom calls her so he goes to find Tom. He takes the call and greets her. He files his nails whilst talking to Angela's mother. He then asks if Angela's ever talked to her about him, when Angela's mother mentions Lance. Angela is seen walking on the street and a car goes past nearly knocking Angela. She shouts at the driver in Tom's voice but a lady with her baby hears this and is horrified. She runs away.

Tom looks up Lance's location on Angela's GPS and calls a taxi to drive him there. On the way, he calls him but he thinks it's Angela calling. When he gets to his house, Lance says that he can sign Angela up to sing in his show; it's clear he's Angela's promoter, not her boyfriend. Tom accidentally says yes to Lance. Then, Tom rides the taxi back to his garage to find Angela at the door. Tom tells Angela that she'll perform that night. Angela's horrified because she has Tom's voice.

Meanwhile, Ginger watches a commercial about a rocket bike. He tries to order one, but the pitchman tells him that he had to be an adult to order one. So, Ginger tries to switch voices with the mailman, and sets the disc at the foot of the mailbox. However, the mailman doesn't have any mail for them. Angry, Ginger goes into the garage to find Angela lip-syncing. Ginger suggests singing together instead, which worked out easier. Then, Ben finds out that Ginger stole the teleportation disk. He chases after him, but fails. Ginger puts his disk under a couch, and Ben jumps in to get it back. He bonks his head and Ginger gets away.

Tom and Angela enter the auditorium and sing in unison. They introduce themselves and then begin to sing, but at the end Angela lets her guard down and speaks out of unison. They explain it was a temporary voice swap, but then the whole audience starts panicking in terror. They come home to find that Ginger had swapped voices with Ben, to order the rocket bike.

I do not know the answer, but in your position I would do absolutely nothing (and not text back Ready) as the later you move to digital voice the better even if they have already sent you a hub 2 with port at the back in which to plug your telephone.

I don't think replying to the texts is actually chargeable, it's just that phone settings & your BT account recognise that the number is of the type that is often chargeable. IIRC in order to reply, you have to alter your phone settings to allow premium texts & also have a spending cap above 0 on your account.

Hello, I feel stuck trying to configure our SG350-28P. My SG350-28P is connected to our datacenter 3560X via fiber. I am able to remotely access the switch via SSH and HTTPS so I know connectivity back to the primary switch is good.