I have 2 call mangers 4.x the first one act as a primary at the HQ and the other is subscriber (in Different Location) with fail over WAN Scenario with a 512kb frame relay between them
The total phones registered on both sides is about 250-280 phones I want to upgrade both sides to CUCM 7.x do I have to upgrade the WAN link between
the 2 sites and what is the minimum band width required and how to calculate it ?
thank you in advance
Amer Abu zied