Vivek
Inside pjsua_acc_config you have this struct:
/**
* Array of credentials. If registration is desired, normally there
should
* be at least one credential specified, to successfully authenticate
* against the service provider. More credentials can be specified, for
* example when the requests are expected to be challenged by the
* proxies in the route set.
*/
pjsip_cred_info cred_info[PJSUA_ACC_MAX_PROXIES];
You might also experience that some servers require the domain name and
some do not.
/Johan
