Hi All I am trying to setup P-CSCF/I-CSCF/S-CSCF using Kamailio 4.2.0. I see configurations as below both in icscf.cfg and scscf.cfg files. *#!define HOSTNAME "icscf-1.imscore.org <http://icscf-1.imscore.org>"* *#!define NETWORKNAME "ims.imscore.org <http://ims.imscore.org>"* First line is *#!define HOSTNAME "icscf-1.imscore.org <http://icscf-1.imscore.org>"*Assuming *icscf-1* is the host name , *imscore.org <http://imscore.org> *is the domain name. Coming to second line *#!define NETWORKNAME "ims.imscore.org <http://ims.imscore.org>"* So it looks to me, NETWORKNAME is something like *ims.domainname* *Is this correct?* *OR* *I should put only domain name in NETWORKNAME* Please clarify. Best Regards kamal