--- zaptel.conf.sample.orig 2005-10-03 07:43:35.000000000 +0800 +++ zaptel.conf.sample 2005-10-03 07:46:36.000000000 +0800 @@ -3,12 +3,33 @@ # # This file is parsed by the Zaptel Configurator, ztcfg # # # First come the span definitions, in the format -# span=,,,,[,yellow] -# +# span=,,,,[,yellow] +# +# All T1/E1 spans generate a clock signal on their transmit side. The +# 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. +# +# Chose 1 to make the equipment at the far end of the E1/T1 link the preferred +# source of the master clock. Chose 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). Chose 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 awlways 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 timing parameter determines the selection of primary, secondary, and # so on sync sources. If this span should be considered a primary sync # source, then give it a value of "1". For a secondary, use "2", and so on. # To not use this as a sync source, just use "0" #