diff --git a/spectrum/src/sample2.cfg b/spectrum/src/sample2.cfg
index 0dedd646f948e647d4163af4ce1fa4aca8b12160..d4e5b417e127b21978ee1c8bad3f4fb1f6c896d4 100644
--- a/spectrum/src/sample2.cfg
+++ b/spectrum/src/sample2.cfg
@@ -1,25 +1,88 @@
 [service]
+# 1 if Spectrum should run in server mode.
+server_mode = 1
+
+# JID of Spectrum instance.
 jid = localhost
+
+# Password used to connect the XMPP server in gateway mode.
+# In server mode, this option is ignored.
 password = secret
+
+# XMPP server to which Spectrum connects in gateway mode.
+# In server mode, this option is ignored.
 server = 127.0.0.1
+
+# XMPP server port.
 port = 5222
-server_mode = 1
-backend_host=localhost # < this option doesn't work yet
+
+# Interface on which Spectrum listens for backends.
+backend_host = localhost
+
+# Port on which Spectrum listens for backends.
 backend_port=10001
-#cert= #patch to PKCS#12 certificate
-#cert_password= #password to that certificate if any
-users_per_backend=1
-backend=spectrum_libpurple_backend
-#backend=spectrum_libircclient-qt_backend
+
+# Full path to PKCS#12 cetficiate used for TLS in server mode.
+#cert=
+
+# Certificate password if any.
+#cert_password= 
+
+# Number of users per one legacy network backend.
+users_per_backend=10
+
+# Full path to backend binary.
+backend=/usr/bin/spectrum_libpurple_backend
+#backend=/usr/bin/spectrum_libircclient-qt_backend
+
+# Libpurple protocol-id for spectrum_libpurple_backend
 protocol=prpl-jabber
 #protocol=prpl-msn
 #protocol=prpl-icq
 
+# prpl-any means that user sets his protocol in his JID which has to be
+# in following format: protocol.username@domain.tld
+# So for example: prpl-jabber.hanzz.k%gmail.com@domain.tld
+#protocol=prpl-any
+
+[identity]
+# Name of Spectrum instance in service discovery
+name=Spectrum Jabber Transport
+
+# Type of transport ("msn", "icq", "xmpp").
+# Check http://xmpp.org/registrar/disco-categories.html#gateway
+type=xmpp
+
+# Category of transport, default is "gateway
+#category=gateway
+
 [logging]
-#config=logging.cfg # log4cxx/log4j logging configuration file
+# log4cxx/log4j logging configuration file in ini format used for main spectrum2 instance.
+#config = logging.cfg 
+
+# log4cxx/log4j logging configuration file in ini format used for backends.
 #backend_config=backend_logging.cfg # log4cxx/log4j logging configuration file for backends
 
 [database]
-type = none # "sqlite3" or "none" without database backend
-database = test.sql
-#prefix=icq
+# Database backend type
+# "sqlite3", "mysql" or "none" without database backend
+type = none 
+
+# For SQLite3: Full path to database
+# For MySQL: name of database
+database = jabber_transport
+
+# Server.
+server = localhost
+
+# Port.
+port = 0
+
+# User.
+user = spectrum
+
+# Paasword.
+password = secret
+
+# Prefix used for tables
+prefix = jabber_