Hi guys, I have a question about the timing source parameter in zaptel.conf. I have 4 T1s coming into a TE410P. One T1 is with one carrier, who provides timing signal. The other 3 T1s are from a different carrier, all sharing the same timing signal. Based on this, I have in /etc/zaptel.conf something like: span=1,1,0,esf,b8zs e&m=1-24 span=2,1,0,esf,b8zs e&m=25-48 span=3,2,0,esf,b8zs e&m=49-72 span=4,2,0,esf,b8zs e&m=73-96 What I have done is set the timing source of the first T1 to be the primary source for itself. For the other three T1s, I set the second T1 to be the primary source for the group of 3 and the other two as secondary sources. Is this correct? The reason I ask is because every so often I hear people complaint about call drops. It doesn't happen to everyone, so I don't know if it has anything to do with time source selection and synchronization issues that may be affecting individual channels. After a report of a call drop, I check dmesg and I don't really see any errors. Sometimes I just see ... disable echo cancel... messages on specific channels, but that shouldn't be a reason to drop a call. Am I right? Any ideas? Thanks, Waldo
Waldo Rubinstein wrote:> One T1 is with one carrier, who provides timing signal. > > The other 3 T1s are from a different carrier, all sharing the same > timing signal. > > Based on this, I have in /etc/zaptel.conf something like: > > > span=1,1,0,esf,b8zs > e&m=1-24 > > span=2,1,0,esf,b8zs > e&m=25-48 > > span=3,2,0,esf,b8zs > e&m=49-72 > > span=4,2,0,esf,b8zs > e&m=73-96I don't think there is such a thing as 'timing groups' like you are thinking about. The primary option for timing is 1, and secondary is 2, third is 3, etc. If 1 is down, it goes 2 to, etc. I'm just learning myself, but I'm pretty sure it should be: span=1,1,0,esf,b8zs e&m=1-24 span=2,2,0,esf,b8zs e&m=25-48 span=3,3,0,esf,b8zs e&m=49-72 span=4,4,0,esf,b8zs e&m=73-96 Kevin
My understanding there should only be one timing source per TE410. You should use a "REAL" Telco T1 for a timing source. - Otherwise, do not choose any if for example all PBX T1's installed. The settings is only a priority level for asterisk to obtain the source. Example: 1 = use this source first choice, 2 = use this source if source 1 is down, and so on.. Bart ----- Original Message ----- From: "Waldo Rubinstein" <waldo@trianet.net> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users@lists.digium.com> Sent: Wednesday, November 09, 2005 9:12 AM Subject: [Asterisk-Users] Zaptel T1 Timing Source> Hi guys, > > I have a question about the timing source parameter in zaptel.conf. > > I have 4 T1s coming into a TE410P. > > One T1 is with one carrier, who provides timing signal. > > The other 3 T1s are from a different carrier, all sharing the same timing > signal. > > Based on this, I have in /etc/zaptel.conf something like: > > > span=1,1,0,esf,b8zs > e&m=1-24 > > span=2,1,0,esf,b8zs > e&m=25-48 > > span=3,2,0,esf,b8zs > e&m=49-72 > > span=4,2,0,esf,b8zs > e&m=73-96 > > What I have done is set the timing source of the first T1 to be the > primary source for itself. > > For the other three T1s, I set the second T1 to be the primary source for > the group of 3 and the other two as secondary sources. > > Is this correct? > > The reason I ask is because every so often I hear people complaint about > call drops. It doesn't happen to everyone, so I don't know if it has > anything to do with time source selection and synchronization issues that > may be affecting individual channels. After a report of a call drop, I > check dmesg and I don't really see any errors. Sometimes I just see ... > disable echo cancel... messages on specific channels, but that shouldn't > be a reason to drop a call. > > Am I right? Any ideas? > > Thanks, > Waldo > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com -- > > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > >
Waldo Rubinstein wrote:> span=1,1,0,esf,b8zs > e&m=1-24 > > span=2,1,0,esf,b8zs > e&m=25-48 > > span=3,2,0,esf,b8zs > e&m=49-72 > > span=4,2,0,esf,b8zs > e&m=73-96You are misunderstanding the span provisioning. There is ONE clock in the TE410P card. This clock can either free run or get it's timing (sync) from one of the T1's. If the specified T1 is not available it can be told to look at a second t1 or third or fourth. If span 1 is the carrier with the timing source, try setting it up like this. span=1,1,0,esf,b8zs e&m=1-24 span=2,2,0,esf,b8zs e&m=25-48 span=3,3,0,esf,b8zs e&m=49-72 span=4,4,0,esf,b8zs e&m=73-96 This says use the timing from span 1 if span 1 is up, span 2 if span 1 is down, span 3 if span 1 & 2 are down, span 4 if spans 1,2,3 are down. Don Pobanz