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New Member

ISDN with Phones

Hi Guys!

How much ip-phone the ISDN backup link in the branch can handle if the primary IP Wan link goes down? let consider the no SRST?

Thanks

3 REPLIES
Green

Re: ISDN with Phones

I want to understand how much traffic the backup link can handle

It depends on the BW, number of IP Phones, number of voice calls, other traffic,

Check SRND for those caluclations

THX

Hall of Fame Super Gold

Re: ISDN with Phones

One B channel: about 4 G.729 calls.

Two B chans: 1 G.711 call, or or maybe up to 10 G.729 calls

New Member

Re: ISDN with Phones

Hi Guys

its a branche offices with 2 DSL Mb each at each site we have 50 users

Any Update

Thanks

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