SCN not needed?

[DJTelco]

Advise on the following scenario?:



2 buildings on adjacent city blocks that already have fiber optic run between them to share data. We can use another pair of fiber strands in the same cable for a separate connect that would not impact or be impacted by the existing data traffic - essentially a second LAN that only carries VoIP traffic.


Shouldn't it be possible to place IP phones in the 2nd building directly off a LAN switch (with POE of course)and have them perform as if they were in building 1, with no SCN or routers involved?

IPO > LAN switch> fiber/utp converter >>>> fiber/utp converter>LAN switch>IP phones

If so, is it correct that no VCM are used for calls between IP phones in both buildings, nor access to VMPro from building 2?


Am I dreaming, or will this work as outlined?

 

[intrigrant]

Hole in one!

You can do just that, put in only IP Hard/softphones, thats the big advantage of VoIP.

VCM channels are only necessery for calls from non-VoIP(TDM) to VoIP, BUT, you do need a VCM module as the gatekeeper resides on it and VoIP without a gatekeeper is like a car without a motor, it will not run.

 

[Morrack]

Access to VMPro from an IP phone (counterintuitively) requires a VCM channel. Although VMPro is on the packet bus, it behaves as if it's on the TDM bus, which is why regular digital phones do NOT need VCM to access it (when it's locally installed of course).

Of course you'll also need VCM for those phones to dial outside the building, but I'm sure you knew that.



Peter Sherwood

Morrack Consulting

http://www.morrack.com