The beroNet Gateway is a modular SIP Gateway, which translates the SIP Protocol according to RFC3261 [1] into the protocols of the following technologies:
- ISDN PRI and BRI, according to the EuroISDN Standards ITU/T Q.931 [2]
- FXO, FXS
- GSM, via a GSM Module according to the ETSI GSM AT commandset [3]
Each technology of these technologies has at least 1 Information Element which contains the caller id. Since SIP is a rather loosely defined standard. It has several protocol standard, there are different recommendations and drafts which define where in which Header element the caller ids can or must be present.
| technology | caller id options |
|---|---|
| SIP | From:, P-Preferred-Identity:, P-Asserted-Identity:, Remote-Party-Id: |
| ISDN | OAD, OAD2, QSIG Name |
| Analog | Caller ID, Calling Name |
| GSM | Caller ID |
...