NEC SV8100 install

[msteletech]

Hi, I am not familiar with this system and it is to be installed on 12/17 for new warehouse at another location. The first problem is that they wanted 4 DID tunk incoming and 8 PBX trunks for outbound/inbound. I changed to 6 DID incoming and 6 PBX trunk and increased hardware trunks from 4 to 8. We plan more inbound traffic than outbound and all stations will be DID's faxes,phone,time clocks.
NEC installer said 6 PBX outbound trunks can be inbound too. How if all the stations are DID's? Also, why are the trunks separate? Can they program all inbound and outbound on one DID trunk group of 12 or less to be efficient with NEC hardware/software. In fact, this way 6 & 6 is too much phone service for only 21 stations.
I appreciate any tips in this area due that I am been managing Nortel Option 61 for many years for mid size company.
B. Anderson
Santa Cruz, CA

 

[belevedere]

Analog DID circuits are one way, incoming only. If you have a PRI circuit, then it can be both way.

 

[msteletech]

We have Nortel switch with PBX backup trunks and T1s, when the T1 goes down the DID's can dial out on the PBX hunt group - the 3rd route group. I suppose Nortel offers more diverse solution.
Thank you for your response.

 

[smoom]

A DID circuit is directional - you can receive a call on a DID circuit but you can not place calls outbound over a DID trunk.

A PBX trunk is not directional, you can receive and place calls over a PBX trunk, The big difference is that for a DID circuit the phone company sends the DID number to your equipment, so that your phone system knows who to route the call coming in to. A PBX trunk does not get any information from the phone company other that ring voltage.

T1's and PRI's are not directional unless programmed that way. You are correct that if your T1 or PRI goes down you can have your outbound calls fail over to a PBX trunk, but not a DID circuit.

The amount of trunks that you need is determined by the amount of traffic that you make. Contact your phone company and have them run a trunk study for you. They should be able to tell you the amount of trunks in and out that you need along with your busiest hour. Before you make changes to the amount or types of lines it is always best to find out you are actually using now then make judgments on what to change.

 

[msteletech]

I now have an understanding of routing thank you,- We have 400's DID's pointed at a supertrunk routing and if down outbound can be routed out.
Warehouse NEC - I feel ok about changing from 4 DID's trunks to 6 due that all routing is on DID's and we will have 200 employees at the warehouse to manage who will be calling in and our other site will be calling there too. I did not want to go to PRI in case it went down, etc. Then we would need to add back up trunks and wow way too much phone service for a warehouse environment.
Cheers, Ms. Teletech

 

[OzzieGeorge]

As the saying goes.....

Some people wouldn't know an Erlang if it jumped up and slapped them in the face......

http://www.erlang.com/