future of UC, 297 long-distance calls IP Telephony cellular phones, trends, 18-19 iLBC (Internet Low Bandwidth DSP, 3 Codec), 30 Ethernet switches, 6 IME (Inter-Company Media Engines), handsets, 15-16 SIP trunking for Enterprise net- history of, 1 works, 79 IP Phones, 5 in-box hardware redundancy, 132 microphones, 2 installation, capital costs, 47 PBX, 6 interconnecting softphones, trends, 16-17 H.323 and SIP, 270-271 speakers, 2 SBC, SIP trunking for Enterprise networks, 76 supplementary services, 9-11 internetworking support, SBC vendor VoIP gateways, 7-9 technical requirements, 169-171 WAN connectivity devices, 6-7 interworking WiFi phones, trends, 17-18 encryption interworking, 156-158 IPv6, effect on UC's future, 307 media ISO 9000 certification, 184 codecs, 150-154 ISO 9001 certification, 183 DTMF, 148-150 fax, 155-156 J-K-L modem traffic, 155-156 protocols jitter, 128 applications, 142-143 endpoints, 143 Legal Intercept Servers, SIP trunking for SP networks, 69 SIP normalization, 145-148 legally required supplementary SP UNI, 144 services systems, SIP trunking for investigating bidder background of SP networks, 69 SIP provider, 186-188 length of trial plan, assessing, 253 IP networks levels of security exposure, 113-114 dedicated physical connections, 103 limiting calls per dial-peer, 126 IP addressing, 104 live departments, transitioning to SIP SIP trunking for Enterprise networks, trunks, 37 load balancing, 133 SIP trunking for SP networks, 62-63 with DNS SRV records, 134-136 trends, 12 local calls, 83 IP Phones, 5 local redundancy, 131 long-distance calls, 83 318 machine-to-machine communications solution monitoring, SIP trunking for SP networks, 74-75 machine-to-machine communications, voice quality, 129-130 monthly recurring costs media bandwidth charges, 50 codecs, 150 port/line charges, 49 codec filtering, 152 SLA charges, 50-51 payload types, 151-152 MTP, configuring, 267-270 transcoding, 153 MWI (Message Waiting Indicator), 107 transrating, 154 DTMF, 148-150 fax, 155-156 modem traffic, 155-156 N+1