[Asterisk-Users] Zaptel T1 Timing Source

[Waldo Rubinstein]

Thanks. I now understand it from everyone's comments.

- Waldo

On Nov 9, 2005, at 2:00 PM, Bart Fisher wrote:

> 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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>>>
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>
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