Hi Chi,
That is correct,
Table 1. Call Grading Guidelines
Grade
|
SCSR
|
Duration<20 Sec
|
Good
|
<3%
|
Acceptable
|
3%<=SCSR<=7%
|
Poor
|
>7%
|
Duration>=20 Sec
|
Good
|
<20%
|
Acceptable
|
20%<=SCSR<=30%
|
Poor
|
>30%
|
Note that all audio quality metrics listed in Table 1 are stored in the CMR. For phones that do not generate CMR, such as Cisco TelePresence® TC, CE, CTX, and IX endpoints; Jabber® platforms (all platforms); Cisco IP Communicator; and Cisco Unified Personal Communicator, grading will be “N/A”.
http://www.cisco.com/c/en/us/products/collateral/cloud-systems-management/prime-collaboration/white-paper-c11-735409.html
Manish
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