Dtu

Hi
I am not sure about the HiPath 4300 but I can tell you how I have set up a number of GSM devices on a Hicom 350H. Hope this helps, I know the HiPath 4000 E-doku is pretty much the same as the Hicom 300 E-doku (I have a copy of both).
My GSM gateways are only anaolgue but I would assume you would only define a different type of trunk group for PRI. I also actually use two different GSM carriers to get the best rates.
Our work fleet of ~600 mobiles is with 'A' carrier so I have setup two routes one for 'A' carrier and one for 'B' carrier. 'B' carrier covers the rest as it gives me the best mobile to mobile rate regardless of the carrier the user is with, but for our work fleet the other carriers cannot match the rate 'A' carrier gives to calls between it's mobiles.

1. Digit strings with index number
2. Digit strings with associated routes
3. Routes
4. Trunk groups


1. Digit strings with index number
DISPLAY-LDPLN:TYPE=CD;

2. Digit strings with associated routes
DISPLAY-LDPLN:TYPE=LDP,LDPNO=102;

3. Routes
DISPLAY-LDAT:TYPE=LCR,LROUTE=12;

4. Trunk Groups
DISPLAY-BUEND:TGRP=12;

If you have any further questions, I'll try and help.

j.john

Hi
Thanks for your inputs.
I'll get back to you for further helps.

jk77

Hi Dtu,
Iam pretty new to this Hipath/Hicom.
i) Does Hipath come with additional PRI interface so that you could connect the GSM gateway device to it ?.
ii) In this case all our landline to mobile calls would come to Hipath and gets routed to GSM g/w and goes to the mobile network ? right ?

Dtu

What you have would depend on what was put in at time of installation.

I have GSM Gateways/modems installed at three sites (3 PABXs)

On my Hicom I had spare TMCOW ports so I used those.
On my ISDX-l I had spare analogue trunk ports so I used those.
On my Alcatel PCX 4400 I had spare analogue trunk ports so I used those.

It depends on what you have and what you want to spend. You also need to look at your call traffic to determine which solution is best for you.

Hicom - 9 GSM devices (9 sim cards) taking ~35-40,000 calls per month

ISDX-l - 13 GSM devices taking ~ 40,000 calls per month

4400 - 4 GSM devices taking ~ 10,000 calls per month

So you can see that having 26 devices we are taking about 80-90,000 calls a month off of the landline and to the GSM network.

The devices I used are from http://www.psitek.com/ of the Fusion 100 variety from a local supplier. There are many types and brands of GSM Gateways/Modems this is just the one I used.
Buying another PRI Interface and PRI type GSM gateway wasn't cost effective for us. Plus we use two different carriers so I had to create two different trunk groups and routes.

So a call made from the PABX to a mobile gets treated like a mobile to mobile call. Giving you big cost savings.

jk77

Thats great !
Please do clarify me on the following also,

i) Where does your PSTN /ISDN line get terminated -> on your Hicom or on your GSM gateway ?

ii) If you have two lines ,one getting terminated on Hicom and another on GSM gateway , How do you handle the incoming calls that land on GSM g/w ?

iii) Are you using your GSM g/w only for routing external (mobile) calls from your Hicom , or can it handle incoming calls also ? (i.e routing incoming calls back to Hicom)

Thanks

Dtu

OK

i) Our ISDN is terminated at the HICOM - no change to setup normal incoming/outgoing trunk group.

ii) I believe no matter what type of GSM device you use it will be terminated to the HICOM via some sort of trunk interface whether that is a PRI trunk interface or like we use PSTN type trunk interface.

iii) We only use our GSM gateways for outgoing calls from the HICOM to mobiles, we get a special rate for our mobile fleet from the GSM carrier for calls from a fleet mobile to our DID's (HICOM).

BUT the type we use can do what is called CALLBACK, where an incoming call will be terminated and the GSM gateway will call the person back.

I have attached a zip file with more information on the GSM device we have used. Even if you don't use this type of GSM gateway it might give you a better understanding of how it works.

jk77

sorry Dtu, i couldnt get back as i was in travel.
The document you have attached is interesting.
Thanks for your help ...it has clarified some of my
doubts.

Schooner

Hey DTU,

thanks for that doco, very interesting and it gives me something to throw at the bosses re fixing my Hicom150.

many thanks
Schooner

Dtu

No Problem.

Schooner - We use Vodafone as our 'A' carrier (Our existing mobile fleet is with them) and Optus as the 'B' carrier, we have crunched the numbers a few times and a call from an Optus Mobile to any other mobile is cheaper than ISDN. So apart from the vodaone number range we route all calls to any other mobile range to the Optus GSM gateways.