Hi it is always difficult to explain to govt about open source
In tender document they are asking
Features Required
3-level Automatic Reception with voice guidance
Two-level call forwarding
DISA (Direct Inward System Access) with message
Built-in Voice Message (BV)
Caller ID display on SLT and APT
Flexible SMS routing
Intuitive customization and maintenance
UCD (Uniform Call Distribution) with message
Door phones, Door Openers, and Doorbells
Automatic configuration for outside (CO) line type
Centralized feature setting
PC programming (USB/RS232C) and easy maintenance
CO busy out
You understand that this isn’t a company tech support portal, right? We’re almost all “just users” like you.
I’m not sure this will answer your questions, but at least it will give you a sense of what Asterisk is capable of:
3-level Automatic Reception with voice guidance
You can have as many levels of “reception” as you want with IVR.
Two-level call forwarding
Call forwarding is on a “per endpoint” basis, so you can have as many levels as you want.
DISA (Direct Inward System Access) with message
DISA with and without messaging supported.
Built-in Voice Message (BV)
I’m not sure what this one means, but there are plenty of voice prompt files, plus facilities to do more of that.
Caller ID display on SLT and APT
SLT and APT aren’t meaningful. Caller ID support is dependent on several criteria, so “probably” is a good answer.
Flexible SMS routing
There is no SMS routing built into Asterisk.
Intuitive customization and maintenance
Asterisk is counter-intuitive in terms of customization and maintenance without FreePBX, and even then it can be challenging and filled with dark magic.
UCD (Uniform Call Distribution) with message
I assume this means ring-groups and queues.
Door phones, Door Openers, and Doorbells
There are so many ways to implements these that it’s impossible to give you an answer that would make sense without specifics. The big answer is “yes”.
Automatic configuration for outside (CO) line type
Not even a hope of that. The configuration of the outside line is entirely manual.
Centralized feature setting
How centralized? The system doesn’t work well in multitenant environments, so this one might be exciting.
PC programming (USB/RS232C) and easy maintenance
The system is not programmable using RS-232 in the traditional sense. It is managed through a network based web interface.
CO busy out
You might need to define this one better. I know what I think it means, but I can’t figure out why it would be a PBX requirement.