| Features | | FastWeb | |
|
| |  | |
| ANI Support | | no | |
| Audio Path | | | |
| Always In Audio | | no | |
| Dynamic Audio | | no | |
| BHCC Numbers | | no | |
| Call Deflection | | | |
| Forward All | | no | |
| Forward No Answer | | no | |
| Call Functionality | | | |
| Conference | | no | |
| Hold | | no | |
| Codecs | | | |
| G.711alaw | | no | |
| G.711ulaw | | no | |
| G.729AB | | no | |
| Concurrent Calls | | no | |
| Connection Type Tested | | no | |
| DTMF | | | |
| Inband | | no | |
| RFC 2833 | | no | |
| Faxing | | | |
| G.711 Fax | | no | |
| T.38 Fax | | no | |
| Interaction SIP Proxy | | | |
| Record Route | | no | |
| Supported | | no | |
| Latency | | | |
| Always In | | no | |
| Dynamic | | no | |
| Media Server Support | | no | |
| Multiple Ports | | no | |
| Redundancy Info | | no | |
| RFC 4028 Timers | | no | |
| SIP Authenication Support | | no | |
| Switch Vendor | | no | |
| Transfer Type | | | |
| Blind | | no | |
| Consult | | no | |
| Putback (Refer) | | no | |
| Validation Type | | no | |
