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label argument, GotoIfTime( )
Label Switched Path (LSP)
large Asterisk installations, requirements
large systems
        processor selection
        system requirement guidelines
Last Mile (PSTN)
latency
        IAX outbound calls
        monitoring between Asterisk server and SIP phone
laxprov.conf file
legacy telecommunications equipment
        hardware for Asterisk connections
LEN( ) function
libnewt libraries
        zttool program and
libpri library, loading
libpri package
        compiling
        installing before asterisk
Link button, analog phones
Linux
        directories used by Asterisk
        GNU utilities, selecting and configuring
        kernel Version 2.6, support for Asterisk
        layers of interaction between Asterisk and kernel
        precompiled Asterisk binaries
        problems with IRQs
        systems running udevd, allowing Zaptel access to
        Zaptel drivers
        ztdummy kernel module
load command
loadzone
local show channels command
locking down your phones
logarithmic companding
logger reload command
logger rotate command
logger.conf file 2nd 3rd
        enabling DEBUG output to console
logic ground 2nd
long-distance calls, context for
LookupBlacklist( ) application 2nd
LookupCIDName( ) application
loop start (ls)
low-pass filter
lsmod command
        verifying loading of zaptel module
        verifying loading of ztdummy and its use by zaptel
LSP (Label Switched Path)