We faced similar issue, When the user in LDAP the telephony service in hard phone not connected.I tried to connected LDAP user in Local , then Telephony service is working The LDAP authentication server info added incorrectly. This issue Mostly LDAP ...

Try tracert to phone IP and make sure is it reached 

Log missed call disabled in Line page , That was the issue in my case

Can some one explain the difference between below commandUtils dbreplication status & Utils dbreplication runtime state