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Philipp Maier pmaier at sysmocom.deHello Neels, See 3GPP_TS_48.008, 3.2.1.32 COMPLETE LAYER 3 INFORMATION : Note 4: "Codec List (BSS Supported) shall be included, if the radio access network supports an IP based user plane interface." See also: 3GPP_TS_48.008, 3.2.2.103 Speech Codec List "The length indicator (octet 2) is a binary number indicating the absolute length of the contents after the length indicator. The length depends on the number and type of Speech Codec Elements to be included. The minimum length of one Speech Codec Element is 1 octet and the maximum length is 3 octets. The maximum number of Speech Codec Elements within the Speech Codec List is not defined." I think there is no way in leaving the Codec List (BSS Supported) away. The spec is clear on this. I think the reason is because to decide one would have to look into the detap messages and check if the request is about a call or an LU, or an SMS etc. I am not sure with 3GPP_TS_48.008, 3.2.2.103, the minimum length requirement refers to one item only. So having 0 items in the speech codec list is an allowed situation? If yes, that wold be the correct solution. Including the speech codec list, but with 0 elements. I can make a patch for libosmocore for this. It wouln't take long. Regarding the warning I don't think that start abortion is a good idea. This could lock out users that want to configure via telnet. Best regards, Philipp -- Philipp Maier <pmaier at sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte