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Voice Cards 13-9
FXO Card FXO Card User Screens and Settings
HYBRID
The Hybrid option assigns a three-byte pattern to define the adjustment for return loss (similar
to Build-Out Capacitors). The default, set1, balances to the ideal termination of 600 ohms +
2.15 uF. The other settings are reserved for future use.
WK DLY
The Wink Delay setting allows you to set the wink delay time. The options are units of 100
milliseconds. Settings are 1-99 (100 milliseconds to 9.9 seconds). The Wink Delay and Wink
options are applicable to CCITT systems for determining the delay of the R2 state machine.
They should only be used with modes fxodn and dpt (R2 and i-R2).
WINK
The Wink setting allows you to set the wink duration time. The options are units of 100
milliseconds. Settings are 1-99 (100 milliseconds to 9.9 seconds). This option is only
applicable with modes fxodn and dpt (R2 and i-R2).
SIG CONV
The Signaling Conversion parameter allows you to change the ABCD signaling bits from
CCITT (E1) to ANSI (T1) standards. This conversion is completed regardless of the type of
WAN aggregate (CSU/DSX or CEPT) to which it is attached. The options are off (which
means that ANSI signaling is used) and on (which converts transmit signaling from ANSI to
CCITT format according to the Interface Card Conversion Table for FXO signaling, and also
converts receive signaling from CCITT to ANSI).
RATE
The Rate parameter allows you to use the voice compression capabilities of the ADPCM
resource card. If that card is not present in the system, changes cannot be made to this setting.
The 64K option (default) does not use ADPCM resources (it is the normal operation 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 64kbps (i.e. [24K,1+40K,2],[32K,1+32K,2] and [40K,1+24K,2]). The numeral 1 after the
rate setting assigns that portion of the voice port pair to the odd side of the ADPCM pair. The
numeral 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 manual.