I Just wanted to add something here, Having separate VLAN does nothing in terms of QOS. In fact having a computer feeding from phone make more sense because phone will untag packets coming from PC. and after that its all about your switch how to prioritize packets. Unless there is a way in your switch to prioritize one Vlan over another Vlan, ( i guess it depends on your manufacture, i think Cisco does that and also uses CDP to discover phones) Having different Vlans is not your answer. the most you get is less broadcast.
On 10/19/07, David Gomillion <[EMAIL PROTECTED]> wrote: > > On 10/19/07, Kevin Smith <[EMAIL PROTECTED]> wrote: > > > > > > Robert McNaught wrote: > > > Hi, > > > > > > Has anyone had any great difficulties with QoS using the second > > > ethernet phone in these Polycom phones for desktop machines in a > > > converged network? I had heard that these can cause difficulties when > > > > > used in this manner. I have always tried to persuade customers to go > > > with 2 ethernet drops per workstation to avoid having to use the phone > > > as a switch. > > > > > > I apologize for this question not being directly related to asterisk, > > > but since Polycom phones are used a lot with asterisk, it seems a good > > > place to post ;-) > > > > > > Robert McNaught > > > > >Hi Robert, > > > >While I'm not sure how our network compares with yours, we run about > >twenty 601 phones along with our office workstations (some stations are > >without a phone). Each station with a phone is connected with the other > >Ethernet port on the phone so we have one drop to each station. The > >phones are on a separate VLAN from the rest of the network as well. > >From the user end, I have not had a report of any problems with the > >connections, call quality, etc. I would say give it a shot, maybe with a > >larger network that could change, but for a small office like I'm in > >charge of, it is working just fine. > > > >Kevin > > We have a medium-sized network (120 polycoms of various persuasions, and > 80 workstations), and we haven't had any real problems with phones ruining > QoS. We have the phones on separate VLANs than the workstations. Actually, > every switch has 4 VLANs defined: 2 voice, 2 data, so no VLAN has more than > about 12 devices (about because sometimes we have to put a pocket switch in > a room where the people want to add yet another computer). > > The echo from SIP to SIP with people using cheap headsets has affected us > far more than any problems with PCs trying to suck the bandwidth. If I > remember correctly, recent firmwares on the Polycom phones pretty much do > the right thing, giving priority to the phone traffic. > > To summarize: works OK for us. > > _______________________________________________ > --Bandwidth and Colocation Provided by http://www.api-digital.com-- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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