Max number of IP phones for IP Office 500 v2

[Trason806]

I took a class a while back and the book said that as of 9.0 the IPO could support 384 telephones(extensions.) But those numbers look like they are getting them from 12 expansions of 30 digital or analog. which would be 360. then 3 more internal 8 port cards +24. Which would give 384 physical extensions. That is great. But the book is not very clear on the number of virtual ports (IP) that it can support. Under the: Total number of user/phone ports (inc DS, POT, IP) it just has the same numbers. 384 is listed. Pic attached. It seems weird that an IPO without an expansion can only support 264 IP phones but one with the 4 port expansion can support 384. So these numbers look more like physical port numbers not IP numbers.
So anyone know the max number of IP phones i can have on a IPO 500 V2? I am replacing a OPT61 with about 400 phones.

 

[rdoubrava]

384 total. This includes ip, SIP, digital and analog.
You can create more users than 384. The SE version can go to 1500 total extensions.

 

[mkoker]

VCM resources provide concurrent talk paths. So you'd be limited to 264 IP Phones that are using anything with a different audio codec or anything that is IP to non-ip. IP to IP using the same codec the VCM establishes the call then drops off. 2:1 VCM to IP Phone ratio is fairly common in a moderate call volume environment. Most of the time you can get away with less.

NTSDirect

 

[intrigrant]

Where does the number 264 comes from?
I can have a IP 500v2 with two VCM 64 cards giving 128 VCM Channels.
Using G.711 as a codec and with direct media path enabled the codecs are only used for call setup audio, eg dial tone etc.
Then you can have a dual PRI attached on a VCM64 card thus having 60 ISDN channels, each concurrent call needs 1 VCM channel and we have 128.
If going all IP with SIP trunks then the need of VCM channels is a lot less if the SIP trunk use G.711 as well.
Upto here we have no (zero) extensions used so there still can be 384 IP Phones added to the system.

 

[TheSmash]

Whatever number is quoted I know it's not enforced as I've seen 400+ on a live customer system...

ACSS (SME)