Design of voice/telephone service

Out of interest, why not consider something like FreePBX (or the commercial equivalent), 3CX etc and an analogue FXO card, such as the ones mentioned here: https://www.sangoma.com/products/analog-telephony-cards/

You could use two telephony servers and set them up redundantly and they could be operated and configured logically as a single solution, rather than working with two different solutions.

I see no reason why you cannot use the two devices you suggest at the same time but I imagine they will need separate configuration and the VOIP phone may well need a SIP account on each device. If you go down the FreePBX/3CX route, you can manage analogue and digital lines on the same PBX.

Hi martyn, can u pls focus on my questions?

Fundamentally, the answer would be yes. However, the configuration to make that all work is where your pain will kick in.

Looks like your problem comes more around the way Grandstream designs their equipment. They don't even seem to directly have an FXO gateway offering. But on top of that, it looks they don't make it very easy or clean to interact with an FXO gateway.

Here is a link to something I pulled from Yealink which may provide guidance on how to accomplish what you want. However, if you want something clean and easier, I'd recommend switching to a PBX that's designed to not simply be all in one, but also to interface with other devices. And that's the point where I agree with Martyn on getting something more like 3CX.

The diagram generates about as many questions as it answers.  So, for me, more information is necessary:
May we assume:

"Analog Tel SP" means an analog / POTS telephone provider?
"VOIP SP" means an internet-based VOIP service provider?

Based on the specifications of the SMG1024, I would have to modify these assumptions:
"Analog Tel SP" means an internet-based VOIP service provider?
So, that causes me to ask why there are two of them?

To your questions:
But first, the SMG1024 is a VOIP internet to POTS converter.  Using a VOIP service provider, it supports 24 POTS lines.
And, you show a "SWITCH" (unspecified) through which you show POTS service from the SMG1024 being handled.  
That must be some switch.  I've never seen one.  What is the model?

- Can we use both UCM6510 and GSM1024 at the same time?
Yes, you could.  But, one wonders why?
One reason why would be to continue to use an installed POTS system and telephones.  But the diagram doesn't show that.

- Can we configure so that 1 department will use Analog line (SMG1024); other departments will use VoIP (UCM6510)?
Yes, as above but not with the SMG connected somehow to the (presumed) Ethernet SWITCH.

- If one of these 2 fails , can the IP phone automatically change to the other, so that telephone service will NOT be interrupted?  
The question isn't well-formed.  Analog phones will only work on analog lines.  
So, if the Analog Tel SP fails then the analog phones will be out - end of story.
If the VOIP SP fails then the VOIP phones will be out - also end of story.
Except:
Consider this:
- Use one VOIP SP and two Internet Service Providers for redundancy via a dual-WAN failover gateway router.
- Connect the SMG1024 to your internet gateway followed by the analog phone lines.
- Connect ucm6510 to the gateway as well.  Then connect the LAN side of the UCM6510 to the LAN.  Consider the firewalling requirements for this device unless the gateway *is* the firewall.  Then connect the VOIP phone to the LAN.  (interfacing themay suggest a VLAN but often not).
Then, in this way, if one of the internet service providers fails, the VOIP phones and the analog phones will continue to work.
(well, you have to pay attention to public IP address management in any scheme here).
But, if the telephone service provider fails then it's more complicated because the VOIP phones will likely be configured to point to a particular public IP address or URL.  So failover for that purpose is more complicated and requires a fair bit of discussion with the telco.

- Where can we find the reference link and installation manual for these devices?
I would start here:
http://www.grandstream.com/sites/default/files/Resources/gxp16xx_user_guide.pdf

Hi,

Analog Tel SP" means an analog / POTS telephone provider?
>>> correct
"VOIP SP" means an internet-based VOIP service provider?
>>> that is an leased line , carry voip only, ip sip trunk link

We have another Internet link, I just did not draw it.

The switch is cisco 3850.

Yes we are relocating the office and BOSS wants to keep all Analog lines, otherwises we use only voip

I mean if one of 2 devices SMG and UCM dies, not the service provider, can we have the failover feature?

I mean if one of 2 devices SMG and UCM dies, not the service provider, can we have the failover feature?

No. I think I've already outlined that aspect.  One device outputs analog only.  The other device outputs VOIP only.
What are you proposing to failover FROM and TO??

You have analog only telephones which must be served by analog signals.  Those, in your diagram, can only come from the SMG1024.
You have VIOP only telephones (GXP1610) which can only be served over the LAN by virtue of the UCM6510.
So, if the SMG1024 dies, then all the analog phones have no source.
And, if the UCM dies, then all the VOIP phones have no source.

But wait: "the BOSS wants to keep all Analog lines?  Does that mean that there are indeed straight analog lines??  Where are those shown in the diagram?
The only analog phone capability is served by the SMG1024 and that's not very well diagrammed at the moment and is, in the end, NOT an analog service.

You said...

Hi martyn, can u pls focus on my questions?

In my answer, I said...

I see no reason why you cannot use the two devices you suggest at the same time

and

...and the VOIP phone may well need a SIP account on each device

I think that focused on two of your questions.

If you are not after options, or opinions (certainly if they will cause less pain than your intended route), it's probably best to say so in the initial question and you will only receive direct answers, even if they could be leading you down a route with difficulties. I certainly would have skipped over your question and said nothing. I shall say no more, since it seems as though I have nothing additional to offer on this question and you have made up your mind already that your diagram is the route you want to take.

Hi, how about this diagram? Is it better and feasible?
IMG_20181016_095118481_20181016_0951.jpg

That diagram is much better. So if for any reason UCM6510 goes down, it should fail over to the other one. Let me ask this: what do you actually have in place today? That might make us able to make a feasible recommendation.

To address your other 3 questions:

Can we use both UCM6510 and SMG1024 at the same time?

It looks like your goal to have the SMG act as a POTS interface for your UCM. If your analog lines were getting delivered over a T1, then the SMG1024 wouldn't even be needed (UCM has a built in T1 interface). That said, I'm not 100% sure if the SMG1024 is the right device based on what I'm reading on their own site (doesn't mean that it isn't). Check for other FXO gateways, especially ones known to work with the UCM. However, it looks like Grandstream's phone systems aren't really designed to communicate with non-Grandstream devices without considerable pain.  For me personally, this would be a serious red flag, especially since Grandstream doesn't seem to make FXO gateways.

Can we configure so that 1 department will use Analog line (GSM1024); other departments will use VoIP (UCM6510)?

Generally speaking in terms of VoIP systems, the answer to this kind of scenario would be yes. I can't answer for the exact proposed setup. But also, it looks like they don't have a lot of good documentation online for just getting the thing UCM set up to begin with. And there definitely isn't stuff to make those two devices communicate together.

Where can we find the reference link and installation manual for these devices?

Resources related to the UCM6510: http://www.grandstream.com/support/resources/?title=UCM6510
Resources for the SMG1024: http://www.synway.net/index.php/product/product-content/12/195

Hi, this is just a proposed plan for a new office which will be build in the next 3 months.

The main purpose of SMG1024 is to keep analog lines, and just few people will continue using Analog, most of the staffs will use Voip.

What if we move 2 analog lines from smg to HA100? so that we can use both analog and voip at the same time on just one device-HA100? The other 15 analog lines will be plugged into smg just to reservation and backup?

And if we have both Analog and VOIP input source in one device-ucm; wil it be possible and easier for policy based routing: ones use analog line, ones use voip line?

And just to make sure: we dont need any Analog phone with this diagram, am I right?

The main purpose of SMG1024 is to keep analog lines, and just few people will continue using Analog, most of the staffs will use Voip.

Unless there is a painless way to make it work with the UMC, I wouldn't even use it. I would look into getting a T1 since the Grandstream equipment has an interface for it (but that may require you actually increasing the number of lines to probably about 24).

What if we move 2 analog lines from smg to HA100? so that we can use both analog and voip at the same time on just one device-HA100? The other 15 analog lines will be plugged into smg just to reservation and backup?

That should give you easy access to 2 analog lines. The 15 would still be up for debate.

And if we have both Analog and VOIP input source in one device-ucm; wil it be possible and easier for policy based routing: ones use analog line, ones use voip line?

That would be simpler, yes. However, if you have 2 UCMs, then you would plug all of those things into the HA100.

And just to make sure: we dont need any Analog phone with this diagram, am I right?

Correct. The diagram would work just fine without the analog lines.

Hi, but is it possible for us to change to T1 without changing the analog telephone numbers?

Yes. The difference is in how they are delivering the numbers. However, you should check to see whether they'll make you order more lines in order to be able to do that. (That would clearly be a factor in whether it makes sense or not)

Ok, so I have read most of this and to me it is a complex question.  But back to the original post, I have a question that will probably answer many questions.

Q:  Are all phones VoIP?

If no, then I will follow-up.

If yes, then I am going to assume, and maybe either way that the UCM is probably handling all your calls.  The SMG does not have FXS ports for analog endpoints correct?  Back to the questions.

- Can we use both UCM6510 and GSM1024 at the same time?
     Yes sort of, you already do I think you have a SIP trunk between the UCM and GSM so the UCM can handle the calls.

- Can we configure so that 1 department will use Analog line (GSM1024); other departments will use VoIP (UCM6510)?
     Sure, why not that would just be part of the route plan

- If one of these 2 fails , can the IP phone automatically change to the other, so that telephone service will NOT be interrupted?
     If your design is like I think it is, partially.  The analog lines could forward to a SIP number, maybe depending carrier.  But I think the
     grandstream is handling all calls so if it dies, you are dead.  You could confirm, unplug the grandstream and see if POTS/Analog works.

- Where can we find the reference link and installation manual for these devices?
     manufacture website, no idea

Now if I could make a suggestion.  Ditch the analog lines and go VoIP.  Maybe alarms and fax as needed.  So here is the simple rationale.  You want to achieve a level of HA.  I would recommend to VoIP gateways (UCM) and configure two SIP trunks with the provider as redundant.   Then if either trunk or device fails they can route traffic to the other trunk.  You can still do all the magic and the business will not notice, except in the pocket book.  But 17 analog loops have a cost as well, and probably more than the SIP trunk and DID costs.

That is what I would do, if Grandstream is the best choice, I will not comment.  I would honestly recommend a Cisco Call Manager install, either server based or IOS on a router.  The analog lines are coming in separate as 17 lines, that is why the SMG exists, but a T1 would be preferred if you want a copper solution as well.

But in case the HA100 has problem, what should we do?

Is there any way to use 2 ucm6510 directly (no need HA100)? Otherwise, should we use 2 HA100? What the diagram should be in that case?

But in case the HA100 has problem, what should we do?

With some reconfiguration, you could probably bypass it and connect everything directly to one of your UCM6510s. There's always going to exist a failure point somewhere.

Is there any way to use 2 ucm6510 directly (no need HA100)?

Not if you're looking for automatic switchover in the case of the failure of a UCM6510.

Otherwise, should we use 2 HA100?

I don't think you can. However, you could have 2 with the exact same configuration, and do a manual switchover (if the one in use breaks, swap connections, etc. to the other)

Hi, so this is my final proposal I think.

We will remove SMG1024, only use HA100, 2 x UCM6510. The input source is E1 and SIP trunking, end device will be IP phone
IMG_20181019_141608.jpg

There you go. And see how it simplifies your setup a bit, while also providing some redundancy.