[asterisk-users] cat /proc/zaptel/*

[Tzafrir Cohen]

On Tue, Apr 13, 2010 at 02:53:51PM +0200, Jaap Winius wrote:
> Hi all,
> 
> On an Asterisk/Zaptel 1.4 system, one way to gather diagnostic info is:
> 
> ~# cat /proc/zaptel/*
> Span 1: ZTHFC1 "HFC-S PCI A Zaptel Driver card 0 [TE]" (MASTER) AMI/CCS
> 
> 	   1 ZTHFC1/0/1 Clear (In use)
> 	   2 ZTHFC1/0/2 Clear (In use)
> 	   3 ZTHFC1/0/3 HDLCFCS (In use)
> Span 2: ZTHFC2 "HFC-S PCI A Zaptel Driver card 1 [TE]" AMI/CCS
> 
> 	   4 ZTHFC2/0/1 Clear
> 	   5 ZTHFC2/0/2 Clear
> 	   6 ZTHFC2/0/3 HDLCFCS
> 
> These are two HFC-S PCI A cards. But, what exactly does all of this mean?
> In particular:
> 
> * Span - In telephony, what is the definition of this term?
> * MASTER - How is this relevant? Only for timing purposes?
> * Clear - Is this said because only B-channels use ISDN clear codes?
> * HDLCFCS - Why say this about D-channels? Why not just say HDLC?
> * (In use) - What does this mean and how is this state determined?
> * 1 ZTHFC1/0/1 Clear (In use) - What do each of these columns specify?

http://docs.tzafrir.org.il/dahdi-linux/#_procfs_interface_proc_dahdi

"Clear" basically means this is an ISDN B-channel. HDLCFCS means this is
a D-channel. 'dchan' = 'fcshdlc' . I'll leave aside the issue of 'dchan'
vs. hardhdlc because there's actually some chating here.

-- 
               Tzafrir Cohen
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