A method to detect an end-to-end call on an adaptive multi-rate wideband, AMR-WB, capable network (ON1, ON2) involving at least one monitored identity (S1, S2), the method comprising the following steps: - monitoring call events related to the at least one monitored identity (S1, S2) through at least one intercepting control element (ICE-1, ICE-2) in a telecommunication network (ON1, ON2); - delivering a start notification message (14, 14') to a mediation function and a delivery function unit, MF/DF unit, by the at least one intercepting control element (ICE-1, ICE-2) whenever an AMR-WB codec is adopted in the telecommunication network (ON1, ON2) as a selected codec for an end-to-end call between the at least one monitored identity (S1, S2) and another identity (S2, S1); - delivering an end notification message (18, 18') to the MF/DF unit, by the at least one intercepting control element (ICE-1, ICE-2) whenever the adoption of the AMR-WB codec in the telecommunication network (ON1, ON2) as the selected codec for the end-to-end call is terminated; - delivering call content of the end-to-end call to a law enforcement monitoring facility, LEMF, by the MF/DF unit; - delivering a first intercept related information-continue, IRI-CONTINUE, notification message to the LEMF, by the MF/DF unit, wherein the first IRI-CONTINUE notification message comprises a time stamp indicating a starting time to apply the AMR-WB codec in a post-processing of the call content of the end-to-end call; - delivering a second IRI-CONTINUE notification message to the LEMF, by the MF/DF unit, wherein the second IRI-CONTINUE notification message comprises a time stamp indicating an ending time to stop applying the AMR-WB codec in the post-processing of the call content of the end-to-end call; and - post-processing by the LEMF, the call content of the end-to-end call with the AMR-WB codec to extract complete baseband information, wherein the complete baseband information is extracted in a time frame between the starting time indicated by the time stamp in the first IRI-CONTINUE notification message and the ending time indicated by the second time stamp in the second IRI-CONTINUE notification message. - monitoring call events related to the at least one monitored identity (S1, S2) through at least one intercepting control element (ICE-1, ICE-2) in a telecommunication network (ON1, ON2); - delivering a start notification message (14, 14') to a mediation function and a delivery function unit, MF/DF unit, by the at least one intercepting control element (ICE-1, ICE-2) whenever an AMR-WB codec is adopted in the telecommunication network (ON1, ON2) as a selected codec for an end-to-end call between the at least one monitored identity (S1, S2) and another identity (S2, S1); - delivering an end notification message (18, 18') to the MF/DF unit, by the at least one intercepting control element (ICE-1, ICE-2) whenever the adoption of the AMR-WB codec in the telecommunication network (ON1, ON2) as the selected codec for the end-to-end call is terminated; - delivering call content of the end-to-end call to a law enforcement monitoring facility, LEMF, by the MF/DF unit; - delivering a first intercept related information-continue, IRI-CONTINUE, notification message to the LEMF, by the MF/DF unit, wherein the first IRI-CONTINUE notification message comprises a time stamp indicating a starting time to apply the AMR-WB codec in a post-processing of the call content of the end-to-end call; - delivering a second IRI-CONTINUE notification message to the LEMF, by the MF/DF unit, wherein the second IRI-CONTINUE notification message comprises a time stamp indicating an ending time to stop applying the AMR-WB codec in the post-processing of the call content of the end-to-end call; and - post-processing by the LEMF, the call content of the end-to-end call with the AMR-WB codec to extract complete baseband information, wherein the complete baseband information is extracted in a time frame between the starting time indicated by the time stamp in the first IRI-CONTINUE notification message and the ending time indicated by the second time stamp in the second IRI-CONTINUE notification message.