Difference between RTP relay on and off at Brekeke PBX
| RTP relay | ON | OFF |
| CPU usage | High | Low |
| Traffic through BPBX server | Large | Small |
| SIP devices / services used with BPBX | --Compatible with most SIP devices/services. -- Sending re-INVITE to User Agents (devices/services) does not occur unless SIP timer is used. -- For most SIP services in the market, trouble will be avoided by setting RTP relay ON at ARS rules | --May not be compatible with certain SIP devices/services --Sip devices/services which can handle change in media information using re-INVITE. --Higher possibility of encountering issues with different SIP phones since RTP sessions are directly exchanged peer to peer. -- To confirm interoperability, testing for all combination of devices is recommended |
| Keypad Commands | In-band, RFC2833, SIP-INFO (DTMF-relay) are available | Only SIP-INFO (DTMF-relay) is available |
| Codec Conversion | Codec conversion is handled by Brekeke PBX. User Agents can use different codecs. | Codec conversion will not happen. User Agents need to be connected using the same codec. |
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