[Asterisk-Users] What the best Asterisk architecture for 900+ users?

[Henry Devito]

That's a lot of users for just a couple PRI's are you planning on doing IP 
trunking too?  Just a thought.

 I proposed a approx 1000 phone system with 4 * boxes and 1 SER box for load 
balancing.  3 of the * boxes I had the phones registering on the 4th was 
used just for trunking.

Henry

----- Original Message ----- 
From: "Alphonse Ogulla" <aogulla at gmail.com>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, March 30, 2005 10:24 AM
Subject: [Asterisk-Users] What the best Asterisk architecture for 900+ 
users?


> Hi good people,
> A local Kenyan company wishes to improve its communication system by
> embracing VoIP technology. They currently have a legacy PBX with 17
> analogue trunk lines and about 900 extensions. Going by the tender
> document, the main features they are looking for include:
>
> 01) Converged voice/data infrastructure fully compatible with ISDN.
> i.e. single connection point for both data (PC) and voice (telephone)
> 02) Cost control, i.e. who can call where and when, class of service,
> account codes, LCR and ARS.
> 03) Plug and play
> 04) Inter-branch connectivity (WAN)
> 05) Call detail reporting (call logging) software
> 06) Built-in voicemail
> 07) Built-in automated telephone operators [auto-attendant]
> 08) Built-in out of office notification
> 09) Built-in call conferencing
> 10) Built-in Direct Inward Dialing (DID) and Caller ID
> 11) Secretarial features i.e. ability for secretary to support several
> individuals using single handset.
> 12) Built-in hunt & calling groups
> 13) Multi-line telephone handsets
> 14) Software integration (Built-in Computer Telephony Integration - CTI)
> 15) Built-in support for external/internal music on hold
> 16) Scalability to over 1400 extensions
> 17) Reliabililty i.e. real time operating system, hard drive mirroring
> and redundant power supply.
> 18) PSTN (Telkom) line interfaces i.e. digital and analogue lines
> 19) PABX connectivity i.e. ability to connect to traditional PABX
> using standards based protocol
> 20) Wireless handset/client.
>
> The LAN network consists of 800 access points at 100Mbps on a 1
> Gigabit Ethernet backbone. The WAN connection (VPN) to a remote office
> is via a VSAT link at 64Kbps but is being upgraded to 128Kbps.
>
> I'm interested in giving them a proposal with Asterisk at the core,
> but I'm not sure of the architecture that best fits their needs. The
> architecture I have in mind would consist of at least 1 or 2 E1/PRI
> connections with DID to the Central Office then using a couple of rack
> mountable Asterisk servers with fully redundant hardware, doing the
> call processing bit in a distributed fashion. There are 2 branch
> offices with each having less than 10 users.
>
> Regarding IP phones, cost is not really the driving factor but rather
> the ease of central management with respect to configuration,
> troubleshooting and periodic firmware upgrades. The Polycom range look
> very attractive.
>
> So, what are your views on proposing Asterisk for this tender? How
> many high-end Asterisk servers do you think will be required to serve
> 900-1400 users? Is it possible to manage several Asterisk servers as a
> single virtual server? Your comments and remarks are welcome.
>
> Thanks & regards,
> Alphonse Ogulla
> Nairobi, Kenya
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