Re: [Asterisk-Users] re: hardware requirement -asterisk
Philipp von Klitzing wrote: You'll need to provide the CODEC that you are using in X-Lite! The codec used in Xlite is 711uLaw. I guess it is one of the preferred ones other than gsm. And it is of small size. -- David Kwok FWD#/IAXTEL# : 17001813482 ext 1002 smime.p7s Description: S/MIME Cryptographic Signature
Re: [Asterisk-Users] re hardware requirement - asterisk
fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:02:55:30:54:28 media: Ethernet autoselect (100baseTX full-duplex) status: active inet 192.168.1.1 netmask 0xff00 broadcast 192.168.1.255 inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 For fxp0, the internal interface although the nic can do full-duplex it seems to me that it is only running simplex!! Same for xl0, the external interface. It is running 10BaseT but again it is simplex. Does that affect my voip performance? Is it true that every step of the way the network has to be full-duplex? There are no RFC standards on how duplex settings are negotiated across a cat 5 cable, etc. Most vendors support auto-negotiate, but somewhere near 50% of the time, its negotiated incorrectly. Part of the problem is that both ends of the cable attempt to negotiate at roughly the same time, one end locks into full while the other locks into half. When that happens, the end that thinks full duplex is fine steps all over the packets being sent from the half-duplex end, causing damaged packets, etc. Since we're talking about UDP traffic, that's Not A Good Thing. The system will run fine if both ends are operating at half duplex, however bandwidth (and performance) will be limited to something below about 30% utilization. In many systems, that is more then adequate. However, on a heavily loaded system, statically locking the interfaces (at both ends) to full duplex will allow utilizations up towards 90% without degradation. Rich ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Re Hardware requirement -Asterisk
On my Linux box mii-tool yeilds the following which shows 100mbs full duplex. [EMAIL PROTECTED] gford]# mii-tool eth0: negotiated 100baseTx-FD, link ok /glen [EMAIL PROTECTED] wrote: My ADSL speed is Uplink 128kbit and Downstream 512kbit. The mii-tool does not tell whether eth0 is in full-duplexed mode. It just say that it is 100baseTx. David Kwok -- Glen Ford [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re hardware requirement - asterisk
--- [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I have just checked the Openbsd box on the if interface. fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:02:55:30:54:28 media: Ethernet autoselect (100baseTX full-duplex) status: active inet 192.168.1.1 netmask 0xff00 broadcast 192.168.1.255 inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 For fxp0, the internal interface although the nic can do full-duplex it seems to me that it is only running simplex!! Why do you think it is running simplex. I read the above and see where it says (100baseTX full-duplex) I don't think 10BaseT can run full duplex. I could be wrong but I don't think so. But why does it matter? A single VOIP connection will not even use 1% of a simplex 10BaseT. Simplex 100BaseT should be able to handle dozens and dozens of calls Same for xl0, the external interface. It is running 10BaseT but again it is simplex. Does that affect my voip performance? Is it true that every step of the way the network has to be full-duplex? David Kwok = Chris Albertson Home: 310-376-1029 [EMAIL PROTECTED] Cell: 310-990-7550 Office: 310-336-5189 [EMAIL PROTECTED] KG6OMK __ Do you Yahoo!? Yahoo! Hotjobs: Enter the Signing Bonus Sweepstakes http://hotjobs.sweepstakes.yahoo.com/signingbonus ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] re hardware requirement - asterisk
well, it does say SIMPLEX in the fxp0 flags section. I don't honestly know if this means it's negotiated half duplex, or something beyond that 10baseT is capable of running full duplex, although this requires a NIC capable of is, as well as a switch that can do FD. And regarding the 1% comment, the benefit with full duplex comes in to play with collisions, not so much traffic amounts. -Original Message- From: Chris Albertson [mailto:[EMAIL PROTECTED] Sent: Thursday, January 15, 2004 12:40 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] re hardware requirement - asterisk --- [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I have just checked the Openbsd box on the if interface. fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:02:55:30:54:28 media: Ethernet autoselect (100baseTX full-duplex) status: active inet 192.168.1.1 netmask 0xff00 broadcast 192.168.1.255 inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 For fxp0, the internal interface although the nic can do full-duplex it seems to me that it is only running simplex!! Why do you think it is running simplex. I read the above and see where it says (100baseTX full-duplex) I don't think 10BaseT can run full duplex. I could be wrong but I don't think so. But why does it matter? A single VOIP connection will not even use 1% of a simplex 10BaseT. Simplex 100BaseT should be able to handle dozens and dozens of calls Same for xl0, the external interface. It is running 10BaseT but again it is simplex. Does that affect my voip performance? Is it true that every step of the way the network has to be full-duplex? David Kwok = Chris Albertson Home: 310-376-1029 [EMAIL PROTECTED] Cell: 310-990-7550 Office: 310-336-5189 [EMAIL PROTECTED] KG6OMK __ Do you Yahoo!? Yahoo! Hotjobs: Enter the Signing Bonus Sweepstakes http://hotjobs.sweepstakes.yahoo.com/signingbonus ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] re hardware requirement - asterisk
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chris Albertson Sent: Thursday, January 15, 2004 12:40 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] re hardware requirement - asterisk I don't think 10BaseT can run full duplex. I could be wrong but I don't think so. Where'd you get that idea from? A 10-Base-T connection to a switch port most definitely will (and should) fun full duplex. But why does it matter? A single VOIP connection will not even use 1% of a simplex 10BaseT. Simplex 100BaseT should be able to handle dozens and dozens of calls Properly configured, yes. I don't know the details of your issue, but I've seen more shoddily auto-detected connections that I care to remember (3Com cards on Auto - Cisco Catalyst on Auto anyone?). Lock the speed/duplex on the switch and the server, and check for collisions, etc. on the port. Daryl G. Jurbala BMPC Network Operations Tel (NY): +1 917 477 0468 x235 Tel (MI): +1 616 608 0004 x235 Tel (UK): +44 208 792 6813 x235 Fax: +1 508 526 8500 INOC-DBA: 26412*DGJ PGP Key: http://www.introspect.net/pgp ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re hardware requirement - asterisk
fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:02:55:30:54:28 media: Ethernet autoselect (100baseTX full-duplex) status: active inet 192.168.1.1 netmask 0xff00 broadcast 192.168.1.255 inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 For fxp0, the internal interface although the nic can do full-duplex it seems to me that it is only running simplex!! Why do you think it is running simplex. I read the above and see where it says (100baseTX full-duplex) I don't think 10BaseT can run full duplex. I could be wrong but I don't think so. But why does it matter? A single VOIP connection will not even use 1% of a simplex 10BaseT. Simplex 100BaseT should be able to handle dozens and dozens of calls Just for fun, I moved our * box to a 10meg al-cheapo hub to force 10-half, placed a sip-to-sip call (via two C7960's) and noticed audio was very much half duplex. Very irritating to say the least (worse then most digital cell-to-cell calls). Then without changing anything other then moving the * interface to an upstream switch running 100 full (and verifying settings), the half-duplex-sounding audio effects completely disappeared (as expected). While both tests were being conducted, I ran a Sniffer analyzer to monitor packets and validate results. 10-half vs 10-full does have a substantial impact on quality. Moving from 10-full to 100-full would have no impact unless I could have loaded it with more rtp sessions then what I currently have the ability to do. And, FWIW, an interface set to half-duplex on one end with full-duplex on the other end was by far worse then when both ends of the cat 5 matched. All tests were conducted by forcing rtp traffic thru * (didn't allow the rtp to flow between the two sip phones). BTW, 10-Full setting is truly available on a large number of NICs, but not all. Obviously, the older stuff didn't support it, nor do the older Cisco 10 meg interfaces, etc. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] re: hardware requirement -asterisk
Referring to my previous post about degradation of voice quality when having more than 2 connection. The actual route is: pc xlite - local asterisk box - iaxtel - local asterisk I have tried out a different situation: pc xlite - local asterisk box - iaxtel and the second connection pc xlite - local asterisk box - iaxtel - local asterisk The same degradation happens as soon as the second connection is connected. I am suspecting the ADSL connection. The internet part is ADSL with 512k down and 128k UP. The nic is a 3c905c 100baseTX and connected to a NEC ADSL modem. # ifconfig xl0 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 But ifconfig seems to suggest that it is running in simplex mode. Is the degradation a result of the ADSL connection? David Kwok smime.p7s Description: S/MIME Cryptographic Signature
Re: [Asterisk-Users] re: hardware requirement -asterisk
# ifconfig xl0 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 But ifconfig seems to suggest that it is running in simplex mode. If the DSL modem is running in full duplex mode and the card in your machine has auto-negotiated to half-duplex, things go to hell quickly. Auto-negotiation sucks anyway. It works about as well as Plug Play. ifconfig xl0 media 10BaseT mediaopt full-duplex Or hell, try ifconfig xl0 media 100BaseTX mediaopt full-duplex Run netstat -I xl0 -i 1 and watch for collisions. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re: hardware requirement asterisk
On Fri, 16 Jan 2004, [EMAIL PROTECTED] wrote: This is ifconfig on openbsd box: fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 I think this output shows that the fxp0 interface is on simplex mode. Yes its in simplex mode, but this parameter is NOT related to half/full duplex on the port. Check this output from my FreeBSD box: %ifconfig -a sis0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 inet 10.1.1.254 netmask 0xff00 broadcast 10.1.1.255 inet6 fe80::202:e3ff:fe23:e028%sis0 prefixlen 64 scopeid 0x1 ether 00:02:e3:23:e0:28 media: Ethernet autoselect (100baseTX full-duplex) status: active Its the media line you should check! The SIMPLEX in flags is wheter the interface hears its own transmissions or not. /Chris ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re: hardware requirement -asterisk
--- [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Referring to my previous post about degradation of voice quality when having more than 2 connection. The actual route is: pc xlite - local asterisk box - iaxtel - local asterisk I have tried out a different situation: pc xlite - local asterisk box - iaxtel and the second connection pc xlite - local asterisk box - iaxtel - local asterisk The same degradation happens as soon as the second connection is connected. I am suspecting the ADSL connection. The internet part is ADSL with 512k down and 128k UP. The nic is a 3c905c 100baseTX and connected to a NEC ADSL modem. # ifconfig xl0 xl0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 address: 00:01:02:78:11:e8 media: Ethernet autoselect (10baseT) status: active inet 203.219.167.126 netmask 0xfffc broadcast 203.219.167.127 inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 But ifconfig seems to suggest that it is running in simplex mode. Is the degradation a result of the ADSL connection? The fact that you 10BaseT is simplex will not matter as 10Mbps is 20X faster than even the ADSL's downlink speed of 512kbps You bottle neck is the 128kbps uplink speed. You'd think that is a lot but you can't got say codec X uses Y bits per seciond, so two calls are 2Y bps and keep adding calls untill your 128bps is full. It don't work that way. Think in terms of _probibilities_. Say your uplink is one quarter full. What does that mean? It means it is running at 128kbps 25% of the time and zero 75% of the time. So if an audio packet is placed on that line there is a 25% chance it will be delayed in an outbound queue. It is those delays that you hear. Actually the amount of delay is a distribution and what you hear are the tails of the curve. (i.e. there is a 25% change of a delay then there is a 12% change that two packets back to back will be delayed, 6% of three and so on.) With one audio stream there is no competition for the uplink. Adjusting the packet size can have an effect. Very long packets are not good = Chris Albertson Home: 310-376-1029 [EMAIL PROTECTED] Cell: 310-990-7550 Office: 310-336-5189 [EMAIL PROTECTED] KG6OMK __ Do you Yahoo!? Yahoo! Hotjobs: Enter the Signing Bonus Sweepstakes http://hotjobs.sweepstakes.yahoo.com/signingbonus ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re: hardware requirement asterisk
This is ifconfig on openbsd box: fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 I think this output shows that the fxp0 interface is on simplex mode. The voice degradation I referred was by using xlite soft phone. I open 2 line similtaneously and dial to FWD and back to my incoming extension. Xlite is runnning on a w2k box with realtek 100M nic in auto mode. I can bearly hear the welcome message. In many years of doing professional network performance assessments, you found the problem Houston. Statically define all interfaces (including the switch, hope you're not useing a hub) to 10/100 full, and at least part of the problem, if not all, will disappear. :) ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] re: hardware requirement asterisk
At work, we just put in managed switches... one user had lots of collisions, which is strange for a switched network... we set the computer to full/100, and the switch to the same settings, and now it doesnt have any more collisions... DH Rich Adamson wrote: This is ifconfig on openbsd box: fxp0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 I think this output shows that the fxp0 interface is on simplex mode. The voice degradation I referred was by using xlite soft phone. I open 2 line similtaneously and dial to FWD and back to my incoming extension. Xlite is runnning on a w2k box with realtek 100M nic in auto mode. I can bearly hear the welcome message. In many years of doing professional network performance assessments, you found the problem Houston. Statically define all interfaces (including the switch, hope you're not useing a hub) to 10/100 full, and at least part of the problem, if not all, will disappear. :) ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] Re Hardware requirement -Asterisk
My ADSL speed is Uplink 128kbit and Downstream 512kbit. The mii-tool does not tell whether eth0 is in full-duplexed mode. It just say that it is 100baseTx. David Kwok smime.p7s Description: S/MIME Cryptographic Signature
