Telos Zephyr Xstream User Manual page 226

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COMPATIBILITY TIP!
Not all codecs support all sample rates. 32kHz is most commonly supported in MPEG Layer-
3 whereas 48kHz is more commonly used in Layer-2.
24kHz is sometimes seen in Layer-2. In this case set your Transmit or Receive to "L2
Half/24" and this Sample Rate will be used (regardless of the Sample Rate setting)
16kHz is used with G.722 and is automatically employed whenever G.722 is used.
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ZEPHYR CLASSIC VS XSTREAM COMPARISON!
Note: Not all Zephyrs support MPEG Layer-2. Very early units support MPEG Layer-3 and
G.722 only.
The Zephyr Classic and Zephyr Express do not support MPEG Layer-2 at the 32kHz Sample
Rate. When communicating with a Zephyr or Zephyr Express in Layer-2, the 48 kHz sample
rate should be used.
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IMPORTANT TIP!
The Sample Rate selection operates differently if the Interface selection in the third Tel
screen is set to Ethernet or V.35 Single.
For more about this option when used with those Interface selections see Appendix 6 (Special
Operational Modes)
CODEC - Screen 3
A third press of the <CODEC> button shows the screen above.
The Compatibility option on this screen changes the format of the data used to transmit Layer 3
over ISDN for compatibility with some third‐party codecs. You should leave this setting at Zephyr
unless you are experiencing this particular incompatibility.
USER'S MANUAL
Section 11: THE WORKS – Detailed Menu Reference 214