Hi, I am planning to deploy an Asterisk PBX for 100-200 users. I am not sure about PSTN incoming/outgoing line ratio for SIP users. I mean if you recall dial up internet the common line ratio is 1:10 (one line for 10 users on access server or an E1 for 300 users). Can somebody tell me what is the good ratio for incoming and outgoing analogue/ digital PSTN lines. Regards Smir
Shahnawaz Mir wrote:> I am planning to deploy an Asterisk PBX for 100-200 users. I am not > sure about PSTN incoming/outgoing line ratio for SIP users. I mean if > you recall dial up internet the common line ratio is 1:10 (one line > for 10 users on access server or an E1 for 300 users). Can somebody > tell me what is the good ratio for incoming and outgoing analogue/ > digital PSTN lines.I don't think there is an answer, it really depends on what your 200 users are going to do. It is not the same if half of your 200 users are sales reps, or if you are setting up 200 extensions for a school where the calls are going to be mostly internal... -- Iv?n Stepaniuk Alba Fot?nica S.L. www.albafotonica.com
On Thu, 15 Oct 2009, Shahnawaz Mir wrote:> I am planning to deploy an Asterisk PBX for 100-200 users. I am not sure > about PSTN incoming/outgoing line ratio for SIP users. I mean if you > recall dial up internet the common line ratio is 1:10 (one line for 10 > users on access server or an E1 for 300 users). Can somebody tell me > what is the good ratio for incoming and outgoing analogue/ digital PSTN > lines.42[:1] (The fact that you ask such a generic question implies you have a high probability of failure. You should hire somebody with a bit more clue and learn from them.) -- Thanks in advance, ------------------------------------------------------------------------- Steve Edwards sedwards at sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000
----- "Steve Edwards" <asterisk.org at sedwards.com> wrote:> On Thu, 15 Oct 2009, Shahnawaz Mir wrote: > > > I am planning to deploy an Asterisk PBX for 100-200 users. I am not > sure > > about PSTN incoming/outgoing line ratio for SIP users. I mean if you > > > recall dial up internet the common line ratio is 1:10 (one line for > 10 > > users on access server or an E1 for 300 users). Can somebody tell me > > > what is the good ratio for incoming and outgoing analogue/ digital > PSTN > > lines. > > 42[:1] > > (The fact that you ask such a generic question implies you have a high > > probability of failure. You should hire somebody with a bit more clue > and > learn from them.) > > -- > Thanks in advance, > ------------------------------------------------------------------------- > Steve Edwards sedwards at sedwards.com Voice: +1-760-468-3867 > PST > Newline Fax: > +1-760-731-3000 >Ignoring unhelpful snobbish remarks from the peanut gallery... Your ratio will depend largely on the usage by your users. In a busy contact center where your users/agents will be on calls nearly 100% of the time, your ratio will need to be closer to 1:1. However, if the installation is for a school where most of the staff (teachers) are instructing in the classroom or otherwise away from their desks, you can get by with a higher ratio like 4:1. As always, you build your system with room for expansion in the event you need additional resource availability. Also, ensure your customer/client understands the limitations of the number simultaneous calls. If you don't tell them and they find out the hard way, you'll be in a world of hurt. Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 x105
Shahnawaz Mir wrote:> Hi, > > I am planning to deploy an Asterisk PBX for 100-200 users. I am not > sure about PSTN incoming/outgoing line ratio for SIP users. I mean if > you recall dial up internet the common line ratio is 1:10 (one line > for 10 users on access server or an E1 for 300 users). Can somebody > tell me what is the good ratio for incoming and outgoing analogue/ > digital PSTN lines. > > Regards > > Smir > > _You need to undertand "traffic". See for instance: http://www.wirelesscommunication.nl/reference/chaptr04/erlang/erlang.htm Regards Jorge Mendoza