Differences between revisions 6 and 17 (spanning 11 versions)
⇤ ← Revision 6 as of 2010-10-15 05:30:47 →
Size: 2862
Editor: PieterSmit
Comment: Add link to voip ethernet BW
← Revision 17 as of 2014-10-09 06:45:57 → ⇥
Size: 159
Editor: CCastella
Comment:
Deletions are marked like this. Additions are marked like this.
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##master-page:HomepageReadWritePageTemplate
##master-date:Unknown-Date
#format wiki
#language en
= Cisco VoiP (Voice over IP) =
 * Cisco BW calculations, and optimization. http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080094ae2.shtml#configvoice
   * Packet size, VAD

 * VoiP [[http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/4_1_2/ccmsys/a02sycfg.html#wp1038253|Bandwidth]] savings.
   1. Codec: G.711 (64 Kbps) , G.729 ('''8 Kbps''' - Voice)('''24 Kbps''' - with serial overhead) ('''32kbps - on [[http://www.voip-info.org/wiki/view/Bandwidth+consumption|ethernet]]''')
   1. Changing Voice Payload Sizes
      * G.729 call with voice payload size of 20 bytes (20 ms):= 24 Kbps 40 bytes (40 ms):= 16 Kbps
        * Note: L2 headers are not considered in this calculation.
   1. RTP Header-Compression or Compressed RTP (cRTP)
      * Compressed Real-Time Protocol (cRTP) reduces the IP/UDP/RTP headers to 2or 4bytes (cRTP is not available over Ethernet).
 
 * [[http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/4_1_2/ccmsys/a02cac.html|Call Admission Control]]
   * Locations, for systems with centralized call processing. Bandwidth (kbps)
   * Regions define the type of compression (G.711, G.723, or G.729) that is used on the link, and locations define the amount of available bandwidth for the link.
   * You assign each device in the system to both a region (by means of a device pool) and a location.







 * Setup BRI at remote site for breakout using central callmanager, H.323
   {{{
      !
      voice-card 0
        dspfarm
        dsp services dspfarm
      !
      voice call carrier capacity active
      voice rtp send-recv
      !
      voice service voip
        h323
      !
      interface FastEthernet0/0.x
        description VOICE-Vlan
        ip address XX
        h323-gateway voip interface
        h323-gateway voip bind srcaddr XX
      !
      interface BRI1/0
        description ISDN-VoicePort
        no ip address
        isdn switch-type basic-net3
        isdn point-to-point-setup
        isdn incoming-voice voice
        isdn send-alerting
        isdn sending-complete
      !
      voice-port 1/0
        compand-type a-law
      !
      voice-port 1/1
        compand-type a-law
      !
      !
      dial-peer voice 20 voip
        destination-pattern 01132699..
        voice-class codec 1
        session target ipv4:10.110.0.102
        incoming called-number 01132699..
        dtmf-relay h245-alphanumeric
        no vad
      !
      dial-peer voice 3 pots
        destination-pattern .T
        progress_ind alert enable 8
        incoming called-number 9...
        direct-inward-dial
        port 0/1
        forward-digits all
     !
     }}}


...
----
CategoryCisco		 My name: Jɑna McCulloch<<BR>>
My age: 23<<BR>>
Сountry: Netherlandѕ<<BR>>
Тown: Katԝijk <<BR>>
Post code: 2223 Jc<<BR>>
Addresѕ: Anemoonstraat 167

My name: Jɑna McCulloch
My age: 23
Сountry: Netherlandѕ
Тown: Katԝijk
Post code: 2223 Jc
Addresѕ: Anemoonstraat 167

Cisco/VoiP (last edited 2017-11-05 10:04:36 by PieterSmit)