1) Configuring a SIP device top

SIP port : 5060
Registrar : sip.iprocall.com
Proxy server : sip.iprocall.com
Outbound proxy server : leave empty
Account name : your iprocall account name
Password : your iprocall voip password
Display name/number : your iprocall account name
Stunserver (option) : leave empty
Codec : G729a

2) Nokia Sip Client settings


Profile Name : Iprocall
Service Profile : IETF
Default Access Point : None
Public User Name : sip:account@sip.iprocall.com
Use compression : No
Registration : Always
Use Security : No
Then Proxy Server & Registrar Server "Same config in both"
Proxy server address : sip.iprocall.com
Realm : Iprocall
Username : your account
Pass : your password
Allow loose routing : Yes
Transport Type : Auto
Port : 5060