[asterisk-users] DAHDI span timeing source

[Satish Patel]

It's connected to teclo AT&T PSTN for outside calling.

So definitly they are master and we are  slave but I'm confused about  
0 is master or slave? Because few people saying 1 is master and 0 is  
slave ? I didn't find any clear document every one trying to explain  
science but none of clear.

--
Sent from my iPhone

On May 27, 2011, at 5:41 PM, Edwin Lam <edwin.lam at officegeneral.com>  
wrote:

> On 5/27/11 2:20 PM, satish patel wrote:
>> Tell me in one word. We have 2 PRI line connected with sangoma card  
>> what option
>> would be good for me?
>>
>> 0 or 1 ?
>
> that would depends on what's the other end of the 2 PRI connected to.
>
>>
>> > Date: Fri, 27 May 2011 16:11:03 -0500
>> > From: sruffell at digium.com
>> > To: asterisk-users at lists.digium.com
>> > Subject: Re: [asterisk-users] DAHDI span timeing source
>> >
>> > On Fri, May 27, 2011 at 08:57:15PM +0000, satish patel wrote:
>> > >
>> > > You mean say
>> > >
>> > > 0=Slave (Use PSTN clock)
>> > > 1=Master(generate Internal clock)
>> > >
>> > > So best option is 0 for all span if you connected on PSTN right ?
>> >
>> > Not really. Looking in system.conf.sample in dahdi-tools [1]
>> >
>> > Choose 1 to make the equipment at the far end of the E1/T1/BRI  
>> link the
>> > preferred source of the master clock. Choose 2 to make it the  
>> second
>> > choice for the master clock, if the first choice port fails (the  
>> far end
>> > dies, a cable breaks, or whatever). Choose 3 to make a port the  
>> third
>> > choice, and so on. If you have, say, 2 ports connected to the  
>> PSTN, mark
>> > those as 1 and 2. The number used for each port should be  
>> different.
>> >
>> > If you choose 0, the port will never be used as a source of  
>> timing. This
>> > is appropriate when you know the far end should always be a slave  
>> to
>> > you. If the port is connected to a channel bank, for example, you  
>> should
>> > always be its master. Likewise, BRI TE ports should always be  
>> configured
>> > as a slave. Any number of ports can be marked as 0.
>> >
>> > [1] http://svn.asterisk.org/view/dahdi/tools/trunk/system.conf.sample?view=co
>
>
> -- 
> Edwin Lam <edwin.lam at officegeneral.com>
> Systems Engineer, OfficeWyze, Inc.
> Ph: +1 415 439 4988 Fax: +1 415 283 3370
> http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0xD6506D20
>
>
> --
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