asterisk users - Oct 2005 - How to configure two Asterisk servers for one call center

Hi All:

I have a situation to be resolved.
Assume that one location call center with 150 agents.
I have two asterisk servers to serve those 150 sip phones. The servers
are connected to PSTN as 4 T1/PRI for each. 
I have a few questions,
Can sip phones login to both servers for the call distribution?
If yes, saying Asterisk server one sends a call to agent A, when
another call comes to Asterisk server two, how does server two know
agent A's status since the call connection information is stored in
server one? does server one and two sharing the same MySQL database help
this issue?
Or I have to build a CTI server to control the call traffic for both
servers, but it sounds to waste the queue facility on both servers. 
Please someone give me some ideas to resolve this situation.

Thanks in advance.

Tielin Xu

On Fri, 2005-10-21 at 09:39 -0700, Tielin Xu wrote:
> Hi All:
> 
> I have a situation to be resolved.
> Assume that one location call center with 150 agents.
> I have two asterisk servers to serve those 150 sip phones. The servers
> are connected to PSTN as 4 T1/PRI for each. 
My question is why do you have about 150% the agents to the line
capacity?  Even with pauses and all do you expect that the 96 (or less
in the case of pri) lines to be in use at all times? 

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
UK +44 870 340 4605   Germany +49 801 777 555 3402
US +1 360 207 0479 or +1 516 687 5200
FreeWorldDialup: 635378
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8 T1s are my setup, assume that all agents take calls, at this time I
set 150 agents, maybe for holidy season I might add another 40 more
agents.
I put the numbers just for example, my question is how to configure the
Asterisk servers.
>>> trixter@0xdecafbad.com 10/21/05 9:53 AM >>>
On Fri, 2005-10-21 at 09:39 -0700, Tielin Xu wrote:
> Hi All:
> 
> I have a situation to be resolved.
> Assume that one location call center with 150 agents.
> I have two asterisk servers to serve those 150 sip phones. The
servers
> are connected to PSTN as 4 T1/PRI for each. 
My question is why do you have about 150% the agents to the line
capacity?  Even with pauses and all do you expect that the 96 (or less
in the case of pri) lines to be in use at all times? 

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
UK +44 870 340 4605   Germany +49 801 777 555 3402
US +1 360 207 0479 or +1 516 687 5200
FreeWorldDialup: 635378

4 T1/PRI Per server...

T1 --> 24 B Channels, in total 8 T1 --> 8*24 = 192 B channels, or in the
case of PRI 240 channels...

trixter aka Bret McDanel wrote:
> On Fri, 2005-10-21 at 09:39 -0700, Tielin Xu wrote:
> 
>>Hi All:
>>
>>I have a situation to be resolved.
>>Assume that one location call center with 150 agents.
>>I have two asterisk servers to serve those 150 sip phones. The servers
>>are connected to PSTN as 4 T1/PRI for each. 
> 
> 
> My question is why do you have about 150% the agents to the line
> capacity?  Even with pauses and all do you expect that the 96 (or less
> in the case of pri) lines to be in use at all times? 
> 
> 
> 
> ------------------------------------------------------------------------
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Digium sells single card handling for 4 T1s, and told me that one server
can carry those four T1s without performance problem.
>>> erik@infopact.nl 10/21/05 10:12 AM >>>
4 T1/PRI Per server...

T1 --> 24 B Channels, in total 8 T1 --> 8*24 = 192 B channels, or in
the case of PRI 240 channels...

trixter aka Bret McDanel wrote:
> On Fri, 2005-10-21 at 09:39 -0700, Tielin Xu wrote:
> 
>>Hi All:
>>
>>I have a situation to be resolved.
>>Assume that one location call center with 150 agents.
>>I have two asterisk servers to serve those 150 sip phones. The
servers
>>are connected to PSTN as 4 T1/PRI for each. 
> 
> 
> My question is why do you have about 150% the agents to the line
> capacity?  Even with pauses and all do you expect that the 96 (or
less
> in the case of pri) lines to be in use at all times? 
> 
> 
> 
>
------------------------------------------------------------------------
> 
> _______________________________________________
> --Bandwidth and Colocation sponsored by Easynews.com --
> 
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com 
> http://lists.digium.com/mailman/listinfo/asterisk-users 
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users 

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>On Fri, 2005-10-21 at 09:39 -0700, Tielin Xu wrote:
>> Hi All:
>>
>> I have a situation to be resolved.
>> Assume that one location call center with 150 agents.
>> I have two asterisk servers to serve those 150 sip phones. The servers
>> are connected to PSTN as 4 T1/PRI for each.
>
>My question is why do you have about 150% the agents to the line
>capacity?  Even with pauses and all do you expect that the 96 (or less
>in the case of pri) lines to be in use at all times?

Predictive dialing ?