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Hello All,<br>
<br>
Whether CRC4 or NCRC4 is used should have NOTHING to do with a
layer 2 or higher (OSI model) protocols...if it does then there is
serious problem, please let us know.<br>
<br>
You should look at all your communication problems with the OSI
model in mind....start at the lowest layer and work your way up
confirming that each layer has a proper, error free connection.<br>
<br>
For an SS7 connection layer 1 is the E1/T1 connection which is
controlled by the interface card....in this case an A108 card by the
looks of it. <br>
<br>
Start the port up using "wanrouter start wanpipeX" where X is
wanpipe number which on a single card system should be the port number.<br>
<br>
Give it a second to stabilize and then run "wanpipemon -i wXg1 -c
Ta"...this command will report the T1/E1 line framer alarms, LIU
alarms, errors counters, and signal strength.<br>
<br>
Are any alarms on ? No...then run "tail -f /var/log/messages" and
confirm that they are bouncing on and off. If there are alarms
reported then you need to resolve them now before moving on to the next
layer.<br>
<br>
With E1's the most common alarm you will see is the OOF alarm being
on in the framer alarms right from the start...this means the incoming
bit stream does not decode as it should most likely because you are
using the wrong line framing. If you see these alarms coming on after
the line has been running fine for a while you have a noise or error
problem...telco support is vital to finding the problem in this case.<br>
<br>
Now...once layer 1 is up and running consistently move on the next
layer...MTP2. MTP2 does it's own HDLC framing so you should never have
hardware HDLC framing set on in the hardware....and here is the first
problem with this install. TDMV_DCHAN tells our hardware to perform
HDLC framing on the specified channel...in this case it is set to 16.
Set this option to TDMV_DHCAN=0 so that the hardware is doing straight
pass-through of all layer 2 traffic on all channels.<br>
<br>
The second problem I saw....and a big give away is when you do a
MTP2 trace and say " but there wasn't any output"....this would mean
that there is no data coming to the MTP2 part of the SS7 stack. Now
since there are so many installs of chan_ss7 that work just fine don't
start questioning the stack. If you have a physical layer that is in a
connected state but are seeing no data then the data is being
intercepted along the way. In this case the problem is most likely
because you are running an echo canceler on an HDLC channel.<br>
<br>
An echo canceler works by recording a certain constant amount of
outgoing data (the "tail" length) and listening for identical data on
the incoming data. If there is a match the data is dropped out of the
incoming stream. In a normal audio stream this only happens when the
incoming data is an echo of the outgoing. In data (aka HDLC streams)
there is a good chance that within the tail there is a repeat of data
causing the echo canceler to drop the data. So the echo canceler needs
to be turned off on the signalling channel.<br>
<br>
The easiest way to turn off a signalling channel is to use the
"wan_ec_client" application in our drivers which can be used to talk
directly to the HWEC. After the startup of the card but before
starting the MTP2 stack you should run "wan_ec_client wanpipeX bd Y"
where X is the port number and Y is the channel number. To do this
automatically add this command to the file /etc/wanpipe/scripts/start
... this script is run after our drivers start and is normally used to
run "ztcfg" automatically.<br>
<br>
Give this a try and let the list know if you continue to have
problems.<br>
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<p class="MsoNormal"><strong><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Thank-you,</span></strong><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);"><br
style="">
<!--[if !supportLineBreakNewLine]--><br style="">
<!--[endif]--><strong><span style="font-family: "Arial","sans-serif";"><o:p></o:p></span></strong></span></b></p>
<p class="MsoNormal"><span class="GramE"><strong><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Konrad
Hammel, </span></strong><strong><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">B.ENG,
</span></strong><strong><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Software
Engineer/Field
Applications Engineer</span></strong><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);"><br>
</span></b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">Sangoma
Technologies Inc. | 50 McIntosh Drive, Suite 120, Markham ON L3R 9T3
Canada<br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);">t.
1 905 474 1990 x 118 | e. <a href="mailto:konrad@sangoma.com"><span
style="color: rgb(79, 129, 189);">konrad@sangoma.com</span></a><u> <br>
</u><a href="http://www.sangoma.com/"><span
style="color: rgb(79, 129, 189); text-decoration: none;">www.sangoma.com</span></a>
| <a href="http://wiki.sangoma.com/"><span
style="color: rgb(79, 129, 189); text-decoration: none;">wiki.sangoma.com</span></a></span><span
style="color: rgb(79, 129, 189);"><br>
</span><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);"><br>
<strong><span style="font-family: "Arial","sans-serif";">Lifetime
Warranty.</span></strong></span></b></span><strong><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(79, 129, 189);"> Because
it must work!</span></strong><span style="color: rgb(79, 129, 189);"><a
href="http://www.tmcnet.com/voip/conference/" target="_blank"><span
style="color: rgb(79, 129, 189); text-decoration: none;"><span style=""></span><span
style=""></span><span style=""></span></span></a><span
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<br>
<br>
Lakshmi Narasimhan .R wrote:
<blockquote
cite="mid:5cdcf6e80907070555g2a928ef5uad4f5c0ac1b44d88@mail.gmail.com"
type="cite">
<pre wrap="">Wanpipe with crc4 enabled is known to cause problem with chan_ss7
signalling no matter what you are trying, so first change the below
setting
FE_FRAME = CRC4
to
FE_FRAME = NCRC4
this will help in finding the actual problem, you might get hints of
the problem in logs.
2009/7/6 chamo <a class="moz-txt-link-rfc2396E" href="mailto:chamo4@darksun.sk"><chamo4@darksun.sk></a>:
</pre>
<blockquote type="cite">
<pre wrap="">hi
i have problems with chan_ss7 to work with EWSD .
i have tried many configuration with and without crc4, with different
clock sources
without success, i always get NOT_ALIGNED message
i have also tried ss7 dump, but there wasn't any output
many thanks for any help, and sorry for my english ;)
############status
dmesg
ADDRCONF(NETDEV_CHANGE): w1g1: link becomes ready
wanpipe1: Global TDM Ring Resync
wanpipe1: Card TDM Rsync Rx=0 Tx=2
wanpipe1: RAI alarm is OFF
wanpipe1: OOF alarm is OFF
mtrr: type mismatch for f9000000,800000 old: write-back new: write-combining
voicegw*CLI> ss7 link status
linkset siuc, link l1, schannel 1, sls 0, NOT_ALIGNED, rx: 0, tx: 4/4,
sentseq/lastack: 127/127, total 4754816, 4754912v
i am also getting this message
WARNING[4390]: mtp.c:513 t2_timeout: MTP2 timer T2 timeout (failed to
receive 'O', 'N', or 'E' after sending 'O'), initial alignment failed on
link 'l1'.
here are my configs
#dahdi system.conf
#autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
#autogenrated on 2009-06-03
#Dahdi Channels Configurations
#For detailed Dahdi options, view /etc/dahdi/system.conf.bak
loadzone=us
defaultzone=us
#Sangoma A108 port 1 [slot:4 bus:3 span:1] <wanpipe1>
span=1,1,0,ccs,hdb3,crc4
#span=1,0,0,ccs,hdb3
bchan=1-31
wanpipe1.conf
#================================================
# WANPIPE1 Configuration File
#================================================
#
# Date: Wed Dec 6 20:29:03 UTC 2006
#
# Note: This file was generated automatically
# by /usr/local/sbin/setup-sangoma program.
#
# If you want to edit this file, it is
# recommended that you use wancfg program
# to do so.
#================================================
# Sangoma Technologies Inc.
#================================================
[devices]
wanpipe1 = WAN_AFT_TE1, Comment
[interfaces]
w1g1 = wanpipe1, , TDM_VOICE, Comment
[wanpipe1]
CARD_TYPE = AFT
S514CPU = A
CommPort = PRI
AUTO_PCISLOT = NO
PCISLOT = 4
PCIBUS = 3
FE_MEDIA = E1
FE_LCODE = HDB3
FE_FRAME = CRC4
FE_LINE = 1
TE_CLOCK = NORMAL
TE_REF_CLOCK = 0
TE_SIG_MODE = CCS
TE_HIGHIMPEDANCE = NO
LBO = 120OH
FE_TXTRISTATE = NO
MTU = 1500
UDPPORT = 9000
TTL = 255
IGNORE_FRONT_END = NO
TDMV_SPAN = 1
TDMV_DCHAN = 16
TDMV_HW_DTMF = YES
TDMV_HW_FAX_DETECT = NO
[w1g1]
ACTIVE_CH = ALL
TDMV_HWEC = YES
ss7.conf
[linkset-siuc]
; The linkset is enabled
enabled => yes
; The end-of-pulsing (ST) is not used to determine when incoming address
is complete
enable_st => no
; Reply incoming call with CON rather than ACM and ANM
use_connect => yes
; The CIC hunting policy (even_mru, odd_lru, seq_lth, seq_htl) is even
CIC numbers, most recently used
hunting_policy => even_mru
; Incoming calls are placed in the ss7 context in the asterisk dialplan
context => ss7
; The language for this context is da
language => da
; The value and action for t35. Value is in msec, action is either st or
timeout
; If you use overlapped dialling dial plan, you might choose: t35 => 4000,st
t35 => 15000,timeout
; The subservice field: national (8), international (0), auto or
decimal/hex value
; The auto means that the subservice is obtained from first received SLTM
subservice => auto
; The host running the mtp3 service
; mtp3server => localhost
[link-l1]
; This link belongs to linkset siuc
linkset => siuc
; The speech/audio circuit channels on this link
channels => 2-31
; The signalling channel
schannel => 1 ;yes i have signalling on channel 1, with libss7 was
working (configs for libss7 are included lower))
; To use the remote mtp3 service, use 'schannel => remote,16'
; The first CIC
firstcic => 1 ;;i have also tried start with firstcic =>2
; The link is enabled
enabled => yes
; Echo cancellation
; echocancel can be one of: no, 31speech (enable only when transmission
medium is 3.1Khz speech), allways
echocancel => no
; echocan_train specifies training period, between 10 to 100 msec
echocan_train => 350
; echocan_taps specifies number of taps, 32, 64, 128 or 256
echocan_taps => 128
[host-voicegw]
; chan_ss7 auto-configures by matching the machines host name with the
host-<name>
; section in the configuration file, in this case 'gentoo1'. The same
; configuration file can thus be used on several hosts.
; The host is enabled
enabled => yes
; The point code for this SS7 signalling point is 0x8e0
;opc => 0x8e0
; 15389 dec
opc => 0x3c1d
; The destination point (peer) code is 0x3fff for linkset siuc
;dpc => siuc:0x3fff
; 15880
dpc => siuc:0x3e08
; Syntax: links => link-name:digium-connector-no
; The links on the host is 'l1', connected to span/connector #1
links => l1:1
; The SCCP global title: translation-type, nature-of-address,
numbering-plan, address
globaltitle => 0x00, 0x04, 0x01, 4546931411
ssn => 7
##
[root@voicegw ~]# uname -a
Linux voicegw 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38 EST 2008 x86_64
x86_64 x86_64 GNU/Linux
###################################
this is working configuration for linss7, it was good, but there were
some problems with ss7 stack
##chan_dahdi.conf
trunkgroup => 1,1
spanmap => 1,1
language=en
context=ss7
switchtype=euroisdn
pridialplan=unknown
prilocaldialplan=national
usecallerid=yes
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
group=1
callgroup=1
pickupgroup=1
ss7_called_nai=dynamic
ss7_calling_nai=dynamic
ss7_internationalprefix = 00
ss7_nationalprefix = 0
ss7_subscriberprefix =
ss7_unknownprefix =
networkindicator=national_spare
signalling = ss7
ss7type = itu
linkset = 1
pointcode = 15389
adjpointcode = 15880
defaultdpc = 15880
cicbeginswith = 2
channel=2-31
sigchan = 1
##system.conf
span=1,1,0,ccs,hdb3,crc4
bchan=2-31
#echocanceller=mg2,2-31
mtp2=1
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