[svn-commits] kpfleming: linux/trunk r5749 - /linux/trunk/README
SVN commits to the Digium repositories
svn-commits at lists.digium.com
Mon Jan 19 12:59:39 CST 2009
Author: kpfleming
Date: Mon Jan 19 12:59:38 2009
New Revision: 5749
URL: http://svn.digium.com/svn-view/dahdi?view=rev&rev=5749
Log:
correct missing words and other typographical errors, and change wording to make sense in this file instead of a mailing list post
Modified:
linux/trunk/README
Modified: linux/trunk/README
URL: http://svn.digium.com/svn-view/dahdi/linux/trunk/README?view=diff&rev=5749&r1=5748&r2=5749
==============================================================================
--- linux/trunk/README (original)
+++ linux/trunk/README Mon Jan 19 12:59:38 2009
@@ -451,31 +451,33 @@
An alarm indicates that a port is not available for some reason. Thus it
is probably not a good idea to try to call out through it.
+
Red Alarm
^^^^^^^^^
-Your T1/E1 port will go into red alarm when it maintain synchronization
-with the remote switch. A red alarm typically indicates either a
-physical wiring problem, loss of connectivity, or a framing and/or
-line-coding mismatch with the remote switch. When your T1/E1 port loses
-sync, it will transmit a yellow alarm to the remote switch to indicate
-that it's having a problem receiving signal from the remore switch.
+Your T1/E1 port will go into red alarm when it cannot maintain
+synchronization with the remote switch. A red alarm typically
+indicates either a physical wiring problem, loss of connectivity, or a
+framing and/or line-coding mismatch with the remote switch. When your
+T1/E1 port loses sync, it will transmit a yellow alarm to the remote
+switch to indicate that it's having a problem receiving signal from
+the remote switch.
The easy way to remember this is that the R in red stands for "right
-here" and "receive"... indicating that we're having a problem right here
-receiving the signal from the remote switch.
+here" and "receive"... indicating that we're having a problem right
+here receiving the signal from the remote switch.
Yellow Alarm
^^^^^^^^^^^^
(RAI -- Remote Alarm Indication)
-Your T1/E1 port will go into yellow alarm when it receives a signal from
-the remote switch that the port on that remote switch is in red alarm.
-This essentially means that the remote switch is not able to maintain
-sync with you, or is not receiving your transmission.
-
-The easy way to remember this is that the Y in yellow stands for
-"yonder"... indicating that the remote switch (over yonder) isn't able
+Your T1/E1 port will go into yellow alarm when it receives a signal
+from the remote switch that the port on that remote switch is in red
+alarm. This essentially means that the remote switch is not able to
+maintain sync with you, or is not receiving your transmission.
+
+The easy way to remember this is that the Y in yellow stands for
+"yonder"... indicating that the remote switch (over yonder) isn't able
to see what you're sending.
@@ -483,13 +485,13 @@
^^^^^^^^^^
(AIS -- Alarm Indication Signal)
-Your T1/E1 port will go into blue alarm when it receives all unframed 1s
-on all timeslots from the remote switch. This is a special signal to
-indicate that the remote switch is having problems with it's upstream
-connection. As far as I know, dahdi_tool/zttool and Asterisk don't
-correctly indicate a blue alarm (at least I've never seen them indicate
-one). The easy way to remember this is that streams are blue, so a blue
-alarm indicates a problem upstream from the switch you're connected to.
+Your T1/E1 port will go into blue alarm when it receives all unframed
+1s on all timeslots from the remote switch. This is a special signal
+to indicate that the remote switch is having problems with its
+upstream connection. dahdi_tool and Asterisk don't correctly indicate
+a blue alarm at this time. The easy way to remember this is that
+streams are blue, so a blue alarm indicates a problem upstream from
+the switch you're connected to.
Recovering from Alarm
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