[asterisk-users] DAHDI span timeing source

[Shaun Ruffell]

On Fri, May 27, 2011 at 09:20:46PM +0000, 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 ?

Look at the two last sentences of the first paragraph I quoted below. I
believe that is your answer...and it's not 0 or 1.

> 
>> 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
>> 

-- 
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org