User guide

Choose the most appropriate switch forwarding mode

Every switch is built to transfer data from any one of its ports to any other as

quickly as possible. Of the numerous factors involved to make this possible is

the forwarding mode: the precise manner in which data packets are deciphered,

checked and transferred.

For use with ALIF units, the Cut-through method generally produces the fastest

results. However, if the network produces numerous data errors then it may be

necessary to use a Store and forward mode instead. On higher grade switches,

the latter should not impact performance too greatly.

Alter ALIF transmier video sengs, if necessary

Within each ALIF transmitter there are various settings that affect the manner in

which video is sent. Below is a brief summary of the common combinations. These

settings can be accessed either through the transmitter tab of AIM or directly

via the AdderLink Innity browser-based conguration utility. Please refer to the

relevant Adder user guides for details.

• If colour quality is important, then leave Colourdepth at 24 bits and adjust

other controls,

• If moving video images are being shown frequently, then leave Frame

Skipping at a low percentage and instead reduce the Peak bandwidth

limiter and Colourdepth.

• Where screens are quite static, try increasing the Background Refresh

interval and/or increasing the Frame skipping percentage setting.

Make changes one at a time, in small steps, and view typical video images so that

you can attribute positive or negative results to the appropriate control.

Please refer to Glossary > ALIF transmitter video settings

Ensure that all ALIF units are fully updated

Early versions of ALIF rmware (pre v2.1) exhibited an issue with the timing

of IGMP join and leave commands that caused multicast ooding (i.e. network

congestion) in certain congurations. Ensure that all ALIF units are fully updated

to the latest rmware version.

Troubleshoong

If you encounter problems during installation or operation, please refer to the

Troubleshooting section for possible remedies.