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Cálculo de ancho de banda

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Calculo de ancho de banda para codecs en telefonía SIP

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Cálculo de ancho de banda

  1. 1. Sametime Unified Telephony 8 Bandwidth Calculation Settings tab, Resource Management Settings dialog, Call Admission Control Management Telephony Control Server > Administration > Call Admission Control Management > Resource Management > Bandwidth Calculation Settings Table 68 Bandwidth Calculation Settings tab, Resource Management dialog Item Description Restore Default Values (button) Click this button to reset all Bandwidth parameters to the preset default values. Fax Calls (area) Fax Call Bit Rate (bps) Values: 2400 4800 7200 9600 12000 14400 Default value: 14400 Fax Packetization Interval (ms) Default value: 20 Fax Recovery Level Possible values: 0 - 10 Default value: 3 Voice Calls (area) RTCP Overhead (0 - 10%) Default value: 4 Codec / Bit Rate (bps) / Packetization Interval (ms) (area) This area shows the available Codecs, together with the Bit Rate (bps) and the Packetization Interval (ms) for each Codec. G.711 A-law Bitrate (bps): 64000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.711 µ-law Bitrate (bps): 64000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.722 Bitrate (bps): 64000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.722.1 @ 24 kbps Bitrate (bps): 24000 Packetization Interval (ms): 40 ms (default) Possible values: 20 40 60 G.722.1 @ 32 kbps Bitrate (bps): 32000 Packetization Interval (ms): 40 ms (default) Possible values: 20 40 60 G.722.1 @ 48 kbps Bitrate (bps): 48000 Packetization Interval (ms): 40 ms (default) Possible values: 20 40 60 G.723 Bitrate (bps): 64000 Packetization Interval (ms): 30 ms (default) Possible values: 30 60 G.726 @ 16 kbps Bitrate (bps): 16000 Packetization Interval (ms): 20 ms (default)
  2. 2. Possible values: 10 20 30 40 50 60 G.726 @ 24 kbps Bitrate (bps): 24000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.726 @ 32 kbps Bitrate (bps): 32000 Packetization Interval (ms): 50 ms (default) Possible values: 10 20 30 40 50 60 G.726 @ 40 kbps Bitrate (bps): 40000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.728 Bitrate (bps): 16000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 G.729 Bitrate (bps): 8000 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 iLBC Bitrate (bps): 15200 Packetization Interval (ms): 20 ms (default) Possible values: 20 30 40 60 AMR Bitrate (bps): 12200 Packetization Interval (ms): 20 ms (default) Possible values: 20 40 60 AMR-WB Bitrate (bps): 23850 Packetization Interval (ms): 20 ms (default) Possible values: 20 40 60 Audio Packet Unknown Bitrate (bps): 6400 Packetization Interval (ms): 20 ms (default) Possible values: 10 20 30 40 50 60 Save (button) Cancel (button) Bandwidth Requirements for Audio Codecs Table 69 and Table 70 show the bandwidth requirements for audio codecs without and with payload encryption, respectively. These tables show the number of concurrent calls that can be transported over various link speeds. The calculations assume a default RTCP overhead of 4%. The required bandwidth and the link speed values shown in the tables are for unidirectional traffic. It should be understood that use of codecs that provide compression introduces a trade-off of speech quality against additional capacity. These tables are provided for reference and planning purposes. Table 69 Bandwidth Requirements - No Calls Using Payload Encryption Codec Codec Bit Rate (kbps) Packetization Interval (ms) Required Bandwidth (kbps) Number of Calls Possible at a Given Link Speed 300 kbps 1 Mbps 2 Mbps G.711 64 10 99.84 3 10 20
  3. 3. or G.722 20 83.20 3 12 24 30 77.65 3 12 25 G.723.1 6.4 30 17.75 16 56 112 G.726-16 or G.728 16 10 49.92 6 20 40 20 33.28 9 30 60 30 27.73 10 36 72 G.726-24 24 10 58.24 5 17 34 20 41.60 7 24 48 30 36.05 8 27 55 G.726-32 32 10 66.56 4 15 30 20 49.92 6 20 40 30 44.37 6 22 45 G.726-40 40 10 74.88 4 13 26 20 58.24 5 17 34 30 52.69 5 18 37 G.729 (including its Annexes A and B) 8 10 41.60 7 24 48 20 24.96 12 40 80 30 19.41 15 51 103 iLBC 15.2 20 32.45 9 30 61 30 26.90 11 37 74 AMR 12.2 20 29.33 10 34 68 AMR-WB 23.85 20 41.44 7 24 48 Table 70 Bandwidth Requirements - All Calls Using Payload Encryption (Worst Case) (Sheet 1 of 2) Codec Codec Bit Rate (kbps) Packetization Interval (ms) Required Bandwidth (kbps) Number of Calls Possible at a Given Link Speed 300 kbps 1 Mbps 2 Mbps G.711 or G.722 64 10 108.16 2 9 18 20 87.36 3 11 22 30 80.43 3 12 24 G.723.1 6.4 30 20.52 14 48 97 G.726-16 or G.728 16 10 58.24 5 17 34 20 37.44 8 26 53 30 30.51 9 32 65 G.726-24 24 10 66.56 4 15 30 20 45.76 6 21 43 30 38.83 7 25 51 G.726-32 32 10 74.88 4 13 26 20 54.08 5 18 36 30 47.15 6 21 42 G.726-40 40 10 83.20 3 12 24
  4. 4. 20 62.40 4 16 32 30 55.47 5 18 36 G.729 (including its Annexes A and B) 8 10 49.92 6 20 40 20 29.12 10 34 68 30 22.19 13 45 90 iLBC 15.2 20 36.61 8 27 54 30 29.67 10 33 67 AMR 12.2 20 33.49 8 29 59 AMR-WB 23.85 20 45.60 6 21 43 Note Please note that when the calling party rings, the system reserves bandwidth for the worst-case scenario. When the called party answers, the system reserves the actual bandwidth used, based on the codecs used by the subscribers. IBM® Lotus® Sametime® Unified Telephony 8 Top Trademarks | Submit Feedback

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