[asterisk-users] DAHDI span timeing source

[Edwin Lam]

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
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