See requirements for super-wideband.

For MTSI-based speech-only with LTE, NR or WLAN access, the clock skew in send direction between the device under test and the reference client should be less than 50 PPM (in absolute value) in error-free conditions. Compliance shall be checked by the relevant test described in TS 26.132.

For MTSI-based speech-only with LTE, NR or WLAN access, a jitter buffer is used in receiving to handle the variation in packet receiver timing (see clause 8 of TS 26.114). If the jitter buffer management (JBM) behaviour is evaluated, the following statistics shall be reported for conditions specified in TS 26.132:

• Delay histogram (on a per sentence basis)
• Quality loss histogram (on a per sentence pair basis)

and all measured delay and quality loss values for these conditions shall be reported as a function of measurement time, together with minimum and maximum values. The relevant test is described in TS 26.132.