Voice quality network requirements
208 Avaya Application Solutions IP Telephony Deployment Guide
●
Packet loss may be more tolerable for one codec over another.
●
Even small amounts of packet loss can greatly affect a TTY/TDD device’s (for
hearing-impaired people) ability to work properly.
●
Packet loss for signaling traffic increases network traffic substantially when loss is greater
than 3%.
Network packet loss
Like delay, Avaya offers customers a tiered approach of packet loss recommendations to
balance new network costs and limitations with business directives. Tools such as Avaya’s VoIP
Monitoring Manager (VMM), the Agilent (HP) Internet Advisor, Finisar's Surveyor Explorer,
Radcom's Prism, NAI's Sniffer, and others measure packet loss. Remember that too much
delay or packet mis-order can be perceived as lost packets. It may appear that the network is
losing packets when in fact they have been discarded intentionally because of late arrival at the
endpoint. IP networks are characterized by unintentional packet loss in the network as well as
by discarded packets in the jitter buffers of the receiving endpoints.
The maximum loss of IP packets (or frames) between endpoints should be:
●
1% or less for best quality depending on many factors.
●
3% or less for Business Communications quality. Again, this quality is much better than
cell-phone quality.
●
More than 3% may be acceptable for voice but may negatively impact signaling.
Содержание Application Solutions
Страница 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Страница 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Страница 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 74: ...Avaya Application Solutions platforms 74 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Страница 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 214: ...Voice quality network requirements 214 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 239: ...Reliability Issue 3 4 1 June 2005 239 Figure 69 S8700 Media Server in a high reliability configuration ...
Страница 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Страница 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 350: ...Implementing Communication Manager on a data network 350 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Страница 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...