MultiVOIP FX User Guide  | 
  | Phone Book Configuration  | ||
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  | Outbound Phone Book Add Entry screen: Field  | 
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  | Definitions (cont’d)  | 
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  | Field Name  | Values  | Description  | 
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  | SIP Fields | 
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  | Use Proxy  | Y/N  | Select if proxy server is used.  | 
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  | Transport  | TCP or  | Voip administrator must choose  | 
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  | Protocol  | UDP | between UDP and TCP  | 
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  | transmission protocols. UDP is a  | 
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  | connectionless protocol where  | 
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  | data is transmitted without  | 
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  | acknowledgment, guaranteed  | 
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  | delivery, or guaranteed packet  | 
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  | sequence integrity. TCP is slower  | 
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  | with greater overhead, but  | 
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  | having acknowledgment and  | 
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  | guarantees delivery and packet  | 
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  | sequence integrity.  | 
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  | SIP Port  | 5060 or other  | The SIP Port Number is a  | |
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  | UDP logical port number.  | 
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  | *See RFC 3087  | The voip will “listen” for SIP  | 
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  | (“Control of  | messages at this logical port.  | 
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  | Service  | If SIP is used, 5060 is the  | 
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  | Context using  | default, standard, or “well  | 
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  | SIP Request-  | known” port number to be  | 
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  | used. If 5060 is not used,  | 
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  | URI,” by the  | 
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  | then the port number used is  | 
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  | Network  | 
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  | that specified in the SIP  | 
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  | Working  | 
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  | Request URI (Universal  | 
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  | Group).  | 
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  | Resource Identifier).  | 
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  | SIP URL  | sip.userphone  | Looking similar to an email  | 
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  | @  | address, a SIP URL  | 
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  | hostserver,  | identifies a user's address.  | 
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  | where  | In SIP communications, each  | 
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  | “userphone”  | caller or callee is identified  | 
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  | is the  | by a SIP url:  | 
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  | telephone  | sip:user_name@host_name.  | 
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  | The format of a sip url is very  | 
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  | number and  | 
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  | similar to an email address,  | 
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  | “hostserver”is  | 
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  | except that the “sip:“ prefix is  | 
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  | the domain  | 
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  | used.  | 
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  | name or an  | 
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  | address on the  | 
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  | network  | 
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