1. ACLI Configuration Guide
  2. SIP Signaling Services
  3. About the Oracle® Enterprise Session Border Controller and SIP
  4. SIP INVITE Message Processing
  5. Example

Example

The following example shows a SIP INVITE message from a softswitch to a Oracle® Enterprise Session Border Controller. 

INVITE sip:05030205555@ss-side-ext-address;gateway=encoded-gw-address
From: "Anonymous"<sip:anonymous@anonymous.invalid>;tag=xxxx
To: <sip:05030205555@ss-side-ext-address;user=phone>

The following example shows a SIP INVITE message from a Oracle® Enterprise Session Border Controller to a gateway. 

INVITE sip:05030205555@gw-ip-address SIP/2.0
From: "Anonymous"<sip:anonymous@anonymous.invalid>;tag=SDxxxx-xxxx
To: <sip:05030205555@ hostpart;user=phone>

The Oracle® Enterprise Session Border Controller converts the hostpart in the To header except in the following scenarios:

  • when the original hostpart value received is an Fully Qualified Domain Name (FQDN)
  • when the Oracle® Enterprise Session Border Controller is configured not to NAT the To headers.

Acme Packet recommends configuring the Oracle® Enterprise Session Border Controller to NAT the To headers to ensure the security of protected addresses. Otherwise, the outgoing hostpart is set to the SIP NAT’s external proxy address for the SIP NAT’s external realm.