[asterisk-users] PSTN to SIP line ratio

[Shahnawaz Mir]

Thanks Tim,

Your response is really helpful. Its not going to be very busy. I was  
expecting 10:1 but I will start some where between 4-10. Thank you  
very much.

Regards

Shahnawaz Mir

On 15-Oct-09, at 11:11 AM, Tim Nelson wrote:

> ----- "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
>
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