Country Code |
The country or region where this system is operating in. This variable is used to adjust system settings for different functional modules. For example, both DSP tones and TDM compounding are country-specific settings that can be determined by this variable. |
Ring Source |
Ring voltage source selection (internal or external): Select internal ring generator (located within TAC) as source for ring voltage to line cards. Select external ring generator (input connector located on TAC) as source for ring voltage to line cards. |
Voice Bandwidth Check |
Turns ON (true) of OFF (false) ATM bandwidth checks for new voice calls going through the system. The bandwidth check is based on the configuration of the Rx and Tx traffic descriptors used for the ATM VC/CID that the call is going across. If rtVBR is being used then the SCR is used for the bandwidth calculation cell rate. If CBR is being used then the PCR is used for the bandwidth calculation cell rate. For any other service category, a call is always allowed and the voice quality is not guaranteed. The bandwidth calculation looks like this (assume approx 180 AAL2 cells used for a voice stream): if ((rxCellRate - (180 * numActiveCallsOn VC)) < 180) reject call else if ((txCellRate - (180 * numActiveCallsOnVC)) < 180) reject call else proceed with call |
March 12, 2011