https://www.digi.com/support/knowledge-base/transport-modbus-configuration
TransPort Modbus Configuration | Digi International
modbus configurationtransportdigiinternational
https://www.cisco.com/c/en/us/td/docs/switches/lan/cisco_ie3100/software/config-guide/b_cip-modbus_cg.html
CIP and MODBUS Configuration Guide, Cisco Catalyst IE31xx Series Switches - Cisco
CIP and MODBUS Configuration Guide, Cisco Catalyst IE31xx Series Switches
modbus configurationcisco catalystcipguideseries
https://www.cisco.com/c/en/us/td/docs/switches/connectedgrid/cgs2520/software/release/12_2_53_ex/configuration/guide/scg2520/swmodbus.html
CGS 2520 Switch Software Configuration Guide, 12.2(53)EX - Configuring MODBUS TCP [Cisco 2500...
This chapter describes Modicon Communication Bus (MODBUS) TCP on the Cisco CGS 2520 switch.