[cisco-voip] Tftp bandwidth Requirements question

[Jordi Riba (Europe)]

Hi, 
 
I've been reading about bandwidth requirements for a Multisite WAN with Centralized Call Processing IPT deployment model and I have not found information about TFTP bandwidth requirements. 
 
I know that tftp packets are marked by CCM with DSCP 26 as all other signalling packets. Then what I don't understand is if I configure for a 120 IP phones branch office deployment a Signalling CoS (between headquarters and branch office) of around 62Kbps... It will take a very long time to register all phones if they need to download their firmware from CCM, isn't it?
 
Do you know how big is the total amount of data that a phone downloads from CCM the first time it start? where can I check it?
 
Do you know how big is the total amout of data a phone need to download from CCM when it registers again to CCM after an SRST situation?
 
All help will be very appreciated.
 
Thanks!
 
Jordi!
 
 
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