>> 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.
> ----- "Steve Edwards" <asterisk....@sedwards.com> wrote: >> >> 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.) On Thu, 15 Oct 2009, Tim Nelson wrote: > Ignoring unhelpful snobbish remarks from the peanut gallery... Really? Seriously? Maybe facetious and direct, but not intended to be snobbish or unhelpful. > 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. Assuming the OP meant "how many PSTN lines (incoming and outgoing) for every x SIP users" (and that you meant 1:4), without knowing the application, 42:1 (or 1:42) is just as relevant as 1:1 or 1:4. (As a parent, if 25% of the teachers are yakking to somebody off-campus, I'd raise holy hell.) > 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. Without the guidance of someone who has been down the road before, he is likely to hit every pothole. I still think hiring some talent to either "do the job" or "mentor" the OP is the most helpful advice I could give. -- Thanks in advance, ------------------------------------------------------------------------- Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000 _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2009 - October 13 - 15 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
