ADDER View Matrix AVM208 Installation And Use Manual page 54

However it is sometimes useful to be able to connect to ports on cascaded units via
a specific cascade cable (rather than the first available of a group) in order to check
that the cabling is working as expected. To do this you can use a hotkey sequence
similar to the example shown below.
For example to connect to port 14 on a AdderView MATRIX that is cascaded off port
1 of your first AdderView MATRIX. Although the following example selects a port
with a four digit address (port 0114) you can type port addresses that are eight digits
long to access computers that are on the forth cascade level (e.g. Port 01140203).
AdderView MATRIX Installation and Use Page 52