Zhone IMACS 8000, User Manual

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12-12 Voice Cards
Model No.
Running Head
FXS Card User Screens and Settings FXS Card
RATE
The Rate parameter allows you to use the voice compression capabilities of an ADPCM card.
If that card is not present in the system, the Rate stays at 64k and cannot be changed. The 64k
option is the normal encoding/decoding rate for voice circuits.
ADPCM voice channels are assigned in pairs by designating two voice ports (E&M, FXO, or
FXS) to the same WAN link and time slot, and selecting rate settings for the pair that add up
to 64 kbps. The following combinations are possible:
• 24K,1+40K,2 (24 kb coding on one side of the time slot and 40 kb coding on the other
side of the same time slot)
• 32K,1+32K,2 (32 kb encoding on each side of a time slot)
• 40K,1+24K,2 (40 kb coding on one side of the time slot and 24 kb coding on the other
side)
Number 1 after the rate setting assigns that portion of the voice port pair to the odd side of the
ADPCM pair. Number 2 after the rate setting assigns that portion of the voice port pair to the
even side of the ADPCM pair.
The number 1 after the rate setting assigns that portion of the voice port pair to the odd side
of the ADPCM pair. The number 2 after the rate setting assigns that portion of the voice port
pair to the even side of the ADPCM pair.
For more information about voice port assignments to the ADPCM card, please consult the
ADPCM section of the Server Card Reference Guide.
ADPCM
The ADPCM parameter lets the user choose which ADPCM card to place this E&M port. The
default setting is n/a and only changes when a Rate smaller than 64k is selected (see above).
The user is then allowed to select which ADPCM card to use for the port (this assignment is
made by chassis slot number). The options are slots P1, P2, and P3.
ISDN CON
The ISDN Connect parameter displays whether the ISDN connection is on or off. The default
setting is always off.