calculate the BW utilization for 100 phones through WAN

[networkexpert]

Dear All ,

I have around 100  users require phones in remote site

phone types :-

95 x 7821

3 x 8845

2 x SX20

what is the expected required BW ? is there any tool to calculate based on the used protocol?

[Dennis Mink]

The phone types really arent that relevant. Check the regions settings and verify what codec they use so say 100 phones using g711 would consume about 100*(64+20%overhead) so about 8mbps. Video is around 2.5mbps on an sx10 using 720p

[balaji.bandi · Accepted solution]

It all depends on what Codec you going to use and transcoding

here is the cisco b/w Calculator for the VoIP phone depends on Codec

https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/7934-bwidth-consume.html

[Jaime Valencia]

The SRND covers this topic, for both, the signaling and the media, and provides estimates or the hard numbers/formulas to be used.