laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-e1-recorder/+/30033 )

Change subject: README: update explaining the difference to other approaches ......................................................................

README: update explaining the difference to other approaches

Change-Id: Ie6afe8016c0168c2f0beee96d6c151c5b4cc5e81 --- M README 1 file changed, 17 insertions(+), 4 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-e1-recorder refs/changes/33/30033/1

diff --git a/README b/README index 149b547..1f7bc72 100644 --- a/README +++ b/README @@ -2,11 +2,24 @@ =================== (C) 2016 by Harald Welte laforge@gnumonks.org

-The idea of this program is to be able to passively record E1/T1 based -communications for purposes of data analysis. +The idea of this program is to be able to build a "poor mans E1/T1 +recorder" purposes of data analysis, *without* any special +equipment.

-Recording of a single E1 link always requires two E1 interface cards, -one for each direction. +This approach is more risky than a purely passive, hardware based +approach as that of the Osmocom e1-tracer released at +https://osmocom.org/projects/e1-t1-adapter/wiki/E1_tracer + +If you can, it is strongly recommended to use the purely passive, +high-impedance tap approach of e1-tracer and not the poor-man's +software proxy approach presented in osmo-e1-recorder. + +Setup +----- + +To do so, two E1 cards are used as some kind of proxy for the E1 +communication. Recording of a single E1 link always requires two E1 +interface cards, one for each direction.

Recording can be performed either * passively, using a E1 Tap aapter