[Asterisk-Users] Zaptel T1 Timing Source
Waldo Rubinstein
waldo at trianet.net
Wed Nov 9 12:46:55 MST 2005
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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>
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