tomset wrote: » What up wireless gurus! I was thinking about this the other day. Wireless LANs operate in half-duplex mode. So how can people have conversations using wireless IP phones? Is the conversation choppy since you can't talk and listen at the same time? It doesn't seem like wireless IP phones would be designed that way so what am I missing?
tomset wrote: » I was thinking about this the other day. Wireless LANs operate in half-duplex mode. So how can people have conversations using wireless IP phones? Is the conversation choppy since you can't talk and listen at the same time? It doesn't seem like wireless IP phones would be designed that way so what am I missing?
tech-airman wrote: » tomset, Are you talking (pun intended) about 802.11a, 802.11b, 802.11g, 802.11n, or don't know?
tomset wrote: » Let me see if I can clarify what I'm asking. If you and I are having a phone conversation, there may be times when I talk and you talk at the same time. When that happens, I talk and can hear you talk at the same time. That requires a full-duplex connection (which the POTS network is). If you're now using a half-duplex connection, we wouldn't be able to talk (and hear each other at the same time). Doing so would cause a collision on the half-duplex connection. Am I wrong?
tiersten wrote: » Why are you assuming that a VoIP call will monopolise the entire connection? It is a packet switched network and not circuit switched. VoIP splits up the data into packets. The packets are sent to the other side. If the link isn't at capacity then there are points in time where the network is free. Packets from the other side can come in at this point. From the point of view of the users, they're having a full duplex voice call.
tomset wrote: » You are familiar with how a half-duplex connection works, right?
tomset wrote: » Bandwidth can't overcome the restrictions of a half-duplex connection no matter how much bandwidth you might have. The duplex settings of the link will still determine how the link will operate. The wireless AP and the wireless IP phone use the same frequency to transmit and receive. If they try to talk to each other at the same time, collisions will occur and both devices will have to wait the random back-off period before re-transmitting.
tomset wrote: » It just seems like you wouldn't be able to have as smooth a conversation on a wireless IP phone as you would with a traditional POTS or landline VoIP call.
dynamik wrote: » Tomset, I don't think you're taking into account how many milliseconds that all occurs in.
networker050184 wrote: » +1 The delay is so small that a person wouldn't notice it.
