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Originally Posted by thargiss
We are looking a implementing a call recording solution and the vendor says that they use the Service Observe feature on the PBX. They need to know how many service observe sessions can be active at one time.
Does anyone have that information?
S8710 v12
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There is no limitation on Service Observing other than the switch's limitation of physical timeslots. So, it's time for a little traffic engineering class ... very high level, very basic:
There are 484 timeslots available for voice communications in a given port network. A single conversation in the same port network takes two timeslots. Therefore, there is a maximum of 242 simultaneous conversations that can occur in a single port network. (This is why we recommend no more than 7-8 trunking T1's in a given port network). Calls that traverse across port networks take an additional timeslot. Therefore, if a call comes into a T1 in PN1 and is answered in PN2, that call is taking up 3 timeslots.
The formula for determining the maximum number of 3-way conferences in your PBX (which is the technical definition of Service Observing) is: ( 484 / 3 ) * # of Port Networks (provided that all members of the call are in the same port network). In a single port network that number would be 161. Keep in mind that this number is goung to decrease with the use of other PBX features that use timeslots (like regular phone calls, intercom calls, other conferences, calls traversing port networks, etc.).
Hope this helps.
regs,
.al.