contrib/e1-prbs-test: Note osmo-e1d capability in README

Change-Id: I76b72359267014c7df431699698c5c4e2c0cd53d
---
M contrib/e1-prbs-test/README
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/contrib/e1-prbs-test/README b/contrib/e1-prbs-test/README
index 903cc39..891fe7f 100644
--- a/contrib/e1-prbs-test/README
+++ b/contrib/e1-prbs-test/README
@@ -1,5 +1,5 @@
-e1-prbs-test - Utility to test for bit errors on E1 lines using DAHDI
-======================================================================
+e1-prbs-test - Utility to test for bit errors on E1 lines
+=========================================================
 
 e1-prbs-test can be used to test for bit errors in E1 transmission
 lines. It consists of a sender and a receiver, which should be used
@@ -8,8 +8,9 @@
 Transmitter and receiver can be on the same machine, or on different
 machines.
 
-The code currently works directly on DAHDI, so only DAHDI-supported E1
-cards are supported at this point.
+The code currently works directly on DAHDI or via osmo-e1d, so both
+DAHDI-supported E1 interfaces as well as osmo-e1d supported ones
+are supported at this point.
 
 The test works by sending timeslot-specific PRBS sequences of 512 bit
 (64byte) length on the transmit side, and by correlating to those PRBS
@@ -25,6 +26,9 @@
 
 The test will run indefinitely.
 
+For using osmo-e1d, use "e1d:0:0" and "e1d:0:1" for interface 0 line 0 + 1
+instead of the /dev/dahdi/chan/xxx notation.
+
 If you'd like to get an interim report, send a SIGHUP to
 e1-prbs-test.
 

