- configures the electrical (RJ-45) and/or optical network connections.
Note:
Every 
has an ‘electrical’ network connection. The 'optical' network card or a second 'electrical' network card is optional.
Network configuration dialog:
- selects which interface to configure.
| • | Interface 1: Electrical (RJ-45) network card |
| • | Interface 2: Optical network card |
- sets the IP address for the appropriate interface. (e.g. 192.168.10.50)
- sets the subnet mask for the appropriate interface. (e.g. 255.255.255.0)
- sets the IP address of the default network Gateway (for the appropriate interface).
- sets the IP address of the DNS (Domain Name System) server for the appropriate interface.
- sets the IP address of the SNMP (Simple Network Management Protocol) manager.
This address will be used as the destination for the SNMP traps.
- defines the transfer rate (Speed) for the appropriate network interface, to either:
| • | Auto (i.e. auto-sensing the network data rate) |
| • | 10 Mbit/s |
| • | 100 Mbit/s |
- selects the operating mode for the appropriate interface as:
| • | Auto (i.e. auto sensing of duplex mode) |
| • | Half duplex |
| • | Full duplex |
- defines the packet size of the IP datagrams used. The maximum value is 1,536 bytes.
Audio Delay
- sets the audio delay applied to the IP interface. The maximum value is 5,000 ms.
Increasing this value can make IP connections more stable, by providing a larger (longer) buffer. For instance the audio delay buffer can compensate jitter problems.
- selects the mode how creates IP packets. This item is just available if system software version 2.2.0.0 (or later) is implemented. There are three possibilities:
| • | variable (default) This means that the payload is rounded to the next full frame or audio block Advantage: No fractional audio frames or blocks in the IP packets Disadvantage: With algorithms with no fix frame length (e.g. AAC) it can happen that the max. possible packet size is exceeded. |
| • | fixed This means that IP payload is exactly the same as the packet size value set at item packetsize (i.e. it is not rounded to the next full audio frame or audio block). Advantage: Even with algorithms with variable frame length the packet size is fix. Disadvantage: IP packet can have fractional audio frames or audio blocks. |
| • | sync. Same as fixed but additionally packets are transmitted in synchronized intervals. Advantage: Same as with fixed but additionally adaptation to network equipment which has got problems with unsynchronized packets. Disadvantage: Same as with fixed. |
Forward Error Correction (FEC)
- creates additional redundant data which enables to recreate lost IP packets on the receiver side. This item is just available if system software version 3.2.0.122 (or later) is implemented. FEC can be set to:
| • | no (default) |
| • | lowestdelay |
| • | lowdelay |
| • | middledelay |
| • | lowbitrate |
| • | highsecurity |
FEC just can be used at RTP connections.
On the one hand FEC enhances the security that transmitted packets are received, but on the other hand it increases the overhead and the delay.
For more info about Forward Error Correction please consult chapter Necessary settings for framed connections/How to establish IP connections/FEC.