j'ai activé le mode debug pour sip et skinny, et voici les logs que j'obtiens ...
Pour y voir plus clair, je tourne avec 2 clients CIPC (1 pc pour chaque client) et 1 pc avec un serveur dhcp, un serveur tftp et le serveur astersik.


== Parsing '/etc/asterisk/asterisk.conf': == Found
== Parsing '/etc/asterisk/extconfig.conf': == Found
Connected to Asterisk 1.8.13.1~dfsg-1ubuntu2 currently running on lol (pid = 17404)
Verbosity was 0 and is now 5
-- Starting Skinny session from 192.168.1.150
-- Device 'SEP001A4B5C3CF6' successfully registered
Device capability set to '0xc (ulaw|alaw)'
lol*CLI> sip set debug o
on off
lol*CLI> sip set debug on
SIP Debugging enabled
lol*CLI> skinny set debug on
Skinny Debugging Enabled
Skinny Client was lost, unregistering
-- Starting Skinny session from 192.168.1.150
Device SEP001A4B5C3CF6 is attempting to register
-- Device 'SEP001A4B5C3CF6' successfully registered
Requesting capabilities
Buttontemplate requested
Sending 30016 template to PHONE_NAME
Received SoftKey Template Request
Received SoftKeySetReq

lol*CLI> sip set
debug history
lol*CLI> sip set debug ip 192.168.1.150
SIP Debugging Enabled for IP: 192.168.1.150
lol*CLI> exit
Executing last minute cleanups
root@lol:/etc/asterisk# /etc/init.d/asterisk restart
Stopping Asterisk PBX: asterisk.
Starting Asterisk PBX: asterisk.
root@lol:/etc/asterisk# asterisk -rvvvvv
Asterisk 1.8.13.1~dfsg-1ubuntu2, Copyright (C) 1999 - 2012 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
================================================== =======================
== Parsing '/etc/asterisk/asterisk.conf': == Found
== Parsing '/etc/asterisk/extconfig.conf': == Found
Connected to Asterisk 1.8.13.1~dfsg-1ubuntu2 currently running on lol (pid = 18385)
Verbosity was 0 and is now 5
lol*CLI> exi
No such command 'exi' (type 'core show help exi' for other possible commands)
lol*CLI> exit
Executing last minute cleanups
root@lol:/etc/asterisk# /etc/init.d/asterisk stop
Stopping Asterisk PBX: asterisk.
root@lol:/etc/asterisk# /etc/init.d/asterisk start
Starting Asterisk PBX: asterisk.
root@lol:/etc/asterisk# asterisk -rvvvvv
Asterisk 1.8.13.1~dfsg-1ubuntu2, Copyright (C) 1999 - 2012 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
================================================== =======================
== Parsing '/etc/asterisk/asterisk.conf': == Found
== Parsing '/etc/asterisk/extconfig.conf': == Found
Connected to Asterisk 1.8.13.1~dfsg-1ubuntu2 currently running on lol (pid = 18450)
Verbosity was 0 and is now 5
lol*CLI> sip set debug ip 192.168.1.150
SIP Debugging Enabled for IP: 192.168.1.150
lol*CLI> sip set debug on
SIP Debugging re-enabled
-- Starting Skinny session from 192.168.1.150
-- Device 'SEP001A4B5C3CF6' successfully registered
Device capability set to '0xc (ulaw|alaw)'
lol*CLI> skinny set debug on
Skinny Debugging Enabled
lol*CLI> skinny reload
[May 23 15:33:05] NOTICE[18494]: chan_skinny.c:7260 config_load: Configuring skinny from skinny.conf
== Parsing '/etc/asterisk/skinny.conf': == Found
[May 23 15:33:05] WARNING[18494]: config.c:1354 process_text_line: No '=' (equal sign) in line 107 of /etc/asterisk/skinny.conf
[May 23 15:33:05] NOTICE[18494]: chan_skinny.c:7170 config_device: Configuring skinny device PHONE_NAME.
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7098 config_parse_variables: Don't know keyword 'model' at line 201
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: nat at line 203
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: callerid at line 204
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: mailbox at line 205
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: threewaycalling at line 208
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: context at line 209
[May 23 15:33:05] ERROR[18494]: chan_skinny.c:7196 config_device: A Skinny device must have at least one line!
[May 23 15:33:05] NOTICE[18494]: chan_skinny.c:7170 config_device: Configuring skinny device PHONE_NAME.
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7098 config_parse_variables: Don't know keyword 'model' at line 214
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: nat at line 216
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: callerid at line 217
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: mailbox at line 218
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: threewaycalling at line 221
[May 23 15:33:05] WARNING[18494]: chan_skinny.c:7101 config_parse_variables: Invalid category used: context at line 222
[May 23 15:33:05] ERROR[18494]: chan_skinny.c:7196 config_device: A Skinny device must have at least one line!
-- Removing device 'PHONE_NAME'
-- Removing device 'PHONE_NAME'