Symmetricom SSU-2000e User Manual page 202

Chapter 8 Output Module Reference Data
E1/2048 kHz Output Module
To enable the squelching feature, you must provision a "threshold" PQL value using
the OUTPUT command (for ICS mode) or the SET-PRMTR-OUTE12048 command
(for TL1 mode). The syntax for each command is shown below. A threshold PQL
value of zero disables the squelch function. Threshold PQL values above zero
enable the squelch function; when the system PQL is greater than the threshold
PQL, the output is squelched.
For example, you can provision output ports 1 through 5 for a threshold PQL of 3
and you can disable squelching for ports 6 through 20 (PQL is set to 0). In this
example, if the system PQL is 1, 2, or 3, ports 1 through 20 generate outputs. If the
system PQL changes to 4 or higher, outputs on ports 1 through 5 are squelched
(turned off) and ports 6 through 20 continue to generate outputs. The response from
the Output Status command appears as shown in the following example.
Copyright 1997-2005, Symmetricom
SSU_2000->out 2A10
2005-09-06T19:43:03Z ID: SSU2000, Name: SSU_2000
Module Name: Output E1/2048
OUT STATUS
Loc# Type Sta Sel
---- ----- --- --- -------- ---- --- ----------------------------------------
2A10 E12M Ok
OUTPUT SETUP
Loc# Type Bypass ZS
---- ----- ------ --- --- --- --- ---
2A10 E12M On
Signal:
P[ 1]= E1, P[ 2]=
P[ 6]= E1, P[ 7]=
P[11]= E1, P[12]=
P[16]= E1, P[17]=
Squelch:
P[ 1]= 0, P[ 2]=
P[ 6]= 0, P[ 7]=
P[11]= 0, P[12]=
P[16]= 0, P[17]=
SSU_2000->
When the System PQL transitions to a PQL that crosses the user-defined Output-
Squelching PQL threshold, the SSU generates a major alarm. The alarm message
for Squelch indicates which port(s) are in alarm due to the PQL threshold being
crossed. In the example Alarm message below, Port 20 of the E1/2048 kHz module
is in alarm.
2002-12-12T10:25:26 2A10 Maj Squelch, Below Prov, 00001
A five-digit hexadecimal number (consisting of 20 bits) at the end of the alarm
message identifies the affected port(s). Each digit represents four of the 20 ports on
the module; the first digit represents ports 1 through 4, the second digit represents
ports 5 through 8, and so on, as shown in
202 SSU-2000e User's Guide
Clk Clk Stat
A B C D Redt PQL
B / / / / 4
-------- E1 -------
SIG CRC SSM BIT
On CAS On On 8
E1, P[ 3]= E1, P[ 4]=
E1, P[ 8]= E1, P[ 9]=
E1, P[13]= E1, P[14]=
E1, P[18]= E1, P[19]=
0, P[ 3]= 0, P[ 4]=
0, P[ 8]= 0, P[ 9]=
0, P[13]= 0, P[14]=
0, P[18]= 0, P[19]=
Port Status 1 1 1 1 1 1 1 1 1 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
/ / / / / / / / / / / / / / / / / / / /
E1, P[ 5]= E1,
E1, P[10]= E1,
E1, P[15]= E1,
E1, P[20]= E1,
0, P[ 5]= 0,
0, P[10]= 0,
0, P[15]= 0,
0, P[20]= 0,
Figure 8-7.
12713140-002-2 Revision E – October 2006