W&T 58620 Manual page 25

W&T
In addition to the Auto-Negotiation mode, both the LAN-Mo-
dems as well as many switches can be configured for fixed
transmission parameters with respect to speed and duplex. To
prevent communications problems (duplex mismatch), only the
following two combinations are permissible:
•
Both parties (switch and LAN-Modem) are operated in Auto-
Negotiation mode.
•
Both parties (switch and LAN-Modem) are configured for the
same (fixed) transmission speeds and duplex mode.
Information on toggling between Auto Negotiation and fixed
transmission speeds can be found in the section Expanded
LAN Modem Settings.
1
Managable switches often have special protocols
(spanning tree, port trunking, ...) as required for
example for uplinks to other switches or broad-band connection
of servers. These protocols are not generally required for
connecting a normal terminal device such as the LAN-Modem,
and they do under some circumstances significantly delay
opening of communication after a new start. We recommend
deactivating these protocols and functions on the port used for
the LAN-Modem. Please consult here with the responsible
network administrator.
Subject to error and alteration
Interfaces and Displays
25