'org.mobicents.servlet.sip:sip-servlets-spec:4.0.21'
<dependency>
<groupId>org.mobicents.servlet.sip</groupId>
<artifactId>sip-servlets-spec</artifactId>
<version>4.0.21</version>
</dependency>
<dependency org="org.mobicents.servlet.sip" name="sip-servlets-spec" rev="4.0.21"/>
"org.mobicents.servlet.sip", "sip-servlets-spec", "4.0.21"