[Asterisk-Users] Zaptel T1 Timing Source

[Bart Fisher]

I don't understand your question - so I'll tell you what to do:

Select one timing source from one T1 that is a Telco connected T1 and make 
it 1 - example: most reliable T1 Source.

If there is two Telco connected T1, select it as source 2

Now if timing source 1 goes down, timing source 2 will take over.

Bart



----- Original Message ----- 
From: "Waldo Rubinstein" <waldo at trianet.net>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Wednesday, November 09, 2005 10:06 AM
Subject: Re: [Asterisk-Users] Zaptel T1 Timing Source


> These are REAL Telco T1s and not connected to a PBX. Am I to assume  that 
> even if they are different providers the timing should be the  same? That 
> doesn't make a lot of sense to me.
>
> Thanks,
> Waldo
>
> On Nov 9, 2005, at 12:34 PM, Bart Fisher wrote:
>
>> 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 at trianet.net>
>> To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
>> <asterisk-users at 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
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