WAN bandwidth requirements for small setups of about a 1000 phones

Nicolas Mansour · ‎05-25-2009

Hi there,

I searched the SRND for bandwidth requirements for clusters over the WAN. The only thing I found is a formula for clusters with a BHCA of over 10,000. Using the following formula:

Total Bandwidth (Mbps) = (Total BHCA/10,000) âˆ— (1 + 0.006 âˆ— Delay), where Delay = RTT delay in msec

My question is the 10,000 a fixed number to use this forumal ? or is there any other way to calculate the WAN requirements?

Thank you in advance.

Nick

Jaime Valencia · ‎05-25-2009

The formulas are here

Bandwidth Provisioning

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/netstruc.html#wp1044772

This is only for the signaling, the DB is fixed at a T1 speed + signaling.

HTH

java

if this helps, please rate

HTH

java

if this helps, please rate