The voice gateway 232 may optionally include host processors, {HEAD ~ LAN/WAN ports}, Ethernet ports, T1 or E1 telephony interface cards, Voice Feature Cards with DSP Modules providing voice compression transcoding , carrier quality echo cancellation with 8 ms 32 ms tail length, a de jitter buffer which adapts to delay variations in the network in order to minimize the delay, {TAIL ~ packet loss concealment} that generates concealment frames for lost packets using information from previously received data, and tone detection and generation 
The voice gateway 232 may optionally include host processors , { HEAD ~ LAN / WAN ports } , Ethernet ports , T1 or E1 telephony interface cards , Voice Feature Cards with DSP Modules providing voice compression transcoding , carrier quality echo cancellation with 8 ms 32 ms tail length , a de jitter buffer which adapts to delay variations in the network in order to minimize the delay , { TAIL ~ packet loss concealment } that generates concealment frames for lost packets using information from previously received data , and tone detection and generation
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