; DAHDI Configuration File
; This file is parsed by the DAHDI Configurator, dahdi_cfg
; Span Configuration
; ^^^^^^^^^^^^^^^^^^
; First come the span definitions, in the format
;   span=<span num>,<timing source>,<line build out (LBO)>,<framing>,<coding>[,yellow]
; All T1/E1 spans generate a clock signal on their transmit side. The
; <timing source> parameter determines whether the clock signal from the far
; end of the T1/E1 is used as the master source of clock timing. If it is, our
; own clock will synchronise to it. T1/E1's connected directly or indirectly to
; a PSTN provider (telco) should generally be the first choice to sync to. The
; PSTN will never be a slave to you. You must be a slave to it.
; Choose 1 to make the equipment at the far end of the E1/T1 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. Any number of ports can be marked as 0.
; Incorrect timing sync may cause clicks/noise in the audio, poor quality or failed
; faxes, unreliable modem operation, and is a general all round bad thing.
; The line build-out (or LBO) is an integer, from the following table:
;  0: 0 db (CSU) / 0-133 feet (DSX-1)
;  1: 133-266 feet (DSX-1)
;  2: 266-399 feet (DSX-1)
;  3: 399-533 feet (DSX-1)
;  4: 533-655 feet (DSX-1)
;  5: -7.5db (CSU)
;  6: -15db (CSU)
;  7: -22.5db (CSU)
; framing:: 
;   one of 'd4' or 'esf' for T1 or 'cas' or 'ccs' for E1 and BRI.
;  'd4' could be referred to as 'sf' or 'superframe'
; coding:: 
;   one of 'ami' or 'b8zs' for T1 or 'ami' or 'hdb3' for E1 and BRI.
;   * For E1 there is the optional keyword 'crc4' to enable CRC4 checking.
;   * If the keyword 'yellow' follows, yellow alarm is transmitted when no
;     channels are open.
; Dynamic Spans
; Next come the dynamic span definitions, in the form:
;   dynamic=<driver>,<address>,<numchans>,<timing>
; Where <driver> is the name of the driver (e.g. eth), <address> is the
; driver specific address (like a MAC for eth), <numchans> is the number
; of channels, and <timing> is a timing priority, like for a normal span.
; use "0" to not use this as a timing source, or prioritize them as
; primary, secondard, etc.  Note that you MUST have a REAL DAHDI device
; if you are not using external timing.
;   dynamic=eth,eth0/00:02:b3:35:43:9c,24,0
; If a non-zero timing value is used, as above, only the last span should
; have the non-zero value. 
; Channel Configuration
; Next come the definitions for using the channels.  The format is:
; <device>=<channel list>
; Valid devices are:
; e&m::
;   Channel(s) are signalled using E&M signalling, besides specifying
;   the channels, alternatively you can specify e1 (i.e. e&m=e1) for use
;   with e1 channels in México (specific implementation, such as Immediate,
;   Wink, or Feature Group D are handled by the userspace library).
; fxsls:: 
;   Channel(s) are signalled using FXS Loopstart protocol.
; fxsgs:: 
;   Channel(s) are signalled using FXS Groundstart protocol.
; fxsks:: 
;   Channel(s) are signalled using FXS Koolstart protocol.
; fxols:: 
;   Channel(s) are signalled using FXO Loopstart protocol.
; fxogs:: 
;   Channel(s) are signalled using FXO Groundstart protocol.
; fxoks:: 
;   Channel(s) are signalled using FXO Koolstart protocol.
; sf:: 
;   Channel(s) are signalled using in-band single freq tone. 
;   Syntax as follows: 
;     channel; => sf:<rxfreq>,<rxbw>,<rxflag>,<txfreq>,<txlevel>,<txflag>
;   rxfreq is rx tone freq in Hz, rxbw is rx notch (and decode)
;   bandwith in hz (typically 10.0), rxflag is either 'normal' or
;   'inverted', txfreq is tx tone freq in hz, txlevel is tx tone 
;   level in dbm, txflag is either 'normal' or 'inverted'. Set 
;   rxfreq or txfreq to 0.0 if that tone is not desired.
; unused:: 
;   No signalling is performed, each channel in the list remains idle
; clear::
;   Channel(s) are bundled into a single span.  No conversion or
;   signalling is performed, and raw data is available on the master.
; bchan:: 
;   Like 'clear' except all channels are treated individually and
;   are not bundled.  'inclear' is an alias for this.
; rawhdlc::
;   The DAHDI driver performs HDLC encoding and decoding on the 
;   bundle, and the resulting data is communicated via the master
;   device.
; dchan::
;   The DAHDI driver performs HDLC encoding and decoding on the
;   bundle and also performs incoming and outgoing FCS insertion
;   and verification.  'fcshdlc' is an alias for this.
; hardhdlc::
;   The hardware driver performs HDLC encoding and decoding on the
;   bundle and also performs incoming and outgoing FCS insertion
;   and verification.  Is subject to limitations and support of underlying
;   hardware.
; nethdlc::
;   The DAHDI driver bundles the channels together into an
;   hdlc network device, which in turn can be configured with
;   sethdlc (available separately). In 2.6.x kernels you can also optionally
;   pass the name for the network interface after the channel list.
;   Syntax:
;     nethdlc=<channel list>[:interface name]
;   Use original names, don't use the names which have been already registered 
;   in system e.g eth.
; dacs::
;   The DAHDI driver cross connects the channels starting at
;   the channel number listed at the end, after a colon
; dacsrbs::
;   The DAHDI driver cross connects the channels starting at
;   the channel number listed at the end, after a colon and 
;   also performs the DACSing of RBS bits
; The channel list is a comma-separated list of channels or ranges, for
; example:
;   1,3,5 (channels one, three, and five)
;   16-23, 29 (channels 16 through 23, as well as channel 29)
; So, some complete examples are:
;   e&m=1-12
;   nethdlc=13-24
;   fxsls=25,26,27,28
;   fxols=29-32
;   e&m=e1
; Tone Zone Data
; Finally, you can preload some tone zones, to prevent them from getting
; overwritten by other users (if you allow non-root users to open /dev/dahdi/*
; interfaces anyway.  Also this means they won't have to be loaded at runtime.
; The format is "loadzone=<zone>" where the zone is a two letter country code.
; You may also specify a default zone with "defaultzone=<zone>" where zone
; is a two letter country code.
; An up-to-date list of the zones can be found in the file zonedata.c
loadzone = us
;loadzone = us-old
; PCI Radio Interface
; (see
; The PCI Radio Interface card interfaces up to 4 two-way radios (either
; a base/mobile radio or repeater system) to DAHDI channels. The driver
; may work either independent of an application, or with it, through
; the driver;s ioctl() interface. This file gives you access to specify
; load-time parameters for Radio channels, so that the driver may run
; by itself, and just act like a generic DAHDI radio interface.
; Unlike the rest of this file, you specify a block of parameters, and
; then the channel(s) to which they apply. CTCSS is specified as a frequency
; in tenths of hertz, for example 131.8 HZ is specified as 1318. DCS
; for receive is specified as the code directly, for example 223. DCS for
; transmit is specified as D and then the code, for example D223.
; The hardware supports a "community" CTCSS decoder system that has
; arbitrary transmit CTCSS or DCS codes associated with them, unlike
; traditional "community" systems that encode the same tone they decode.
; this example is a single tone DCS transmit and receive
; specify the transmit tone (in DCS mode this stays constant):
; specify the receive DCS code:
; this example is a "community" CTCSS (if you only want a single tone, then
; only specify 1 in the ctcss list)
; specify the default transmit tone (when not receiving):
; Specify the receive freq, the tag (use 0 if none), and the transmit code.
; The tag may be used by applications to determine classification of tones.
; The tones are to be specified in order of presedence, most important first.
; Currently, 15 tones may be specified..
; The following parameters may be omitted if their default value is acceptible
; Set the receive debounce time in milliseconds:
; set the transmit quiet dropoff burst time in milliseconds:
; set the COR level threshold (specified in tenths of millivolts)
; valid values are {3125,6250,9375,12500,15625,18750,21875,25000}
; Invert COR signal {y,n}
; Set the external tone mode; yes, no, internal {y,n,i}
; Now apply the configuration to the specified channels:
; We are all done with our channel parameters, so now we specify what
; channels they apply to
; Overiding PCM encoding
; ^^^^^^^^^^^^^^^^^^^^^^
; Usually the channel driver sets the encoding of the PCM for the
; channel (mulaw / alaw. That is: g711u or g711a). However there are
; some cases where you would like to override that. 'mulaw' and 'alaw'
; set different such encoding. Use them for channels you have already
; defined with e.g. 'bchan' or 'fxoks'.
; 'deflaw' is similar, but resets the encoding to the channel driver's
; default. It must be useful for something, I guess.
; Echo Cancellers
; ^^^^^^^^^^^^^^^
; DAHDI uses modular echo cancellers that are configured per channel. The echo
; cancellers are compiled and installed as part of the dahdi-linux package.
; You can specify in this file the echo canceller to be used for each
; channel. The default behavior is for there to be NO echo canceller on any
; channel, so it is very important that you specify one here if you do
; not have hardware echo cancellers and need echo cancellation.
; Valid echo cancellers are: mg2, kb1, sec2, and sec.
; If compiled, 'hpec' is also a valid echo canceller.
; To configure the default echo cancellers, use the format:
; echocanceller=<echocanceller name>,<channel(s)>
; Example:
; Configure channels 1 through 8 to use the mg2 echo canceller
; And change channel 2 to use the kb1 echo canceller.

Created by: james.zhu, Last modification: Mon 07 of May, 2012 (16:33) by admin
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