Hi When using the standard configuration in file "SIPconfig.xml" after enabling and starting the SIP2 servers there are two ports: <service port="8023/tcp" transport="telnet" protocol="SIP/2.00" timeout="60" /> <service port="127.0.0.1:6001/tcp" transport="RAW" protocol="SIP/2.00" client_timeout="600" timeout="60" /> We have just reconfigured the following line port="10.0.0.1:6001/tcp" and our 3M SelfCheck System Model 8420 can successfully connect and communicate via port 6001, without needing to add any sign in commands in expect syntax (which is needed when using port 8023 via telnet, as it is described in https://wiki.koha-community.org/wiki/Setting_up_Koha_SIP_and_3M_machines ). Can someone please explain why there are two ports? Are these just offering the same functionality in two different ways (telnet, RAW), or is it maybe recommended to use telnet for some unknown security reasons? Best wishes: Michael -- Geschäftsführer · Diplombibliothekar BBS, Informatiker eidg. Fachausweis Admin Kuhn GmbH · Pappelstrasse 20 · 4123 Allschwil · Schweiz T 0041 (0)61 261 55 61 · E mik@adminkuhn.ch · W www.adminkuhn.ch