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Content for  TS 26.131  Word version:  18.1.0

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8.12  Echo control characteristicsp. 101

See requirements for super-wideband.

8.12.1  Handsetp. 101

Requirements are for further study.

8.12.2  Headsetp. 101

Requirements are for further study.

8.12.3  Handheld hands-freep. 101

Requirements are for further study.

8.12.4  Desktop hands-freep. 101

Requirements are for further study.

8.12.5  Electrical interface |R17|p. 101

Requirements are for further study.

8.13  Clock accuracy |R14|p. 101

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.

8.14  Jitter buffer management behavior |R14|p. 101

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.
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$  Change historyp. 104


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