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Setting up a Gamma SIP service on a BCM 50/450 at release 6.0 1

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Firebird Scrambler

Firebird Scrambler

Systems Engineer
Apr 7, 2003
7,205
GB
I've been asked if it was possible to configure a BCM system to work on Gamma SIP trunks. Has anyone successfully been able to get their service to work OK please?. If so, can you kindly pass on any useful tips please?.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = linkedin
 
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I have never heard of Gamma SIP

I doubt anyone can give you a definitive answer. Best bet is to figure out if their requirements are similar to one of the official solution guides that nortel/avaya have published a certified configuration for and work from there. In general you will need to request a test account/trunk before signing any contracts to verify you can make it work.

Is there anything unique or special about their requirements?
Do you have any technical documentation on what method they use to authorize the connection (IP based or registration) Do they require encryption on any level?
What headers and format do they require for the SIP headers?

For the most part I can make the BCM play ball with standard SIP providers. Encryption would likely be an issue requiring an SBC to translate for you (SBC acts as man in the middle rewriting any headers and doing any format translations required)

From what I can guess they will give you an IP based trunk. So you give them your static IP and they route SIP calls to that IP on port 5060 and accept calls from that IP, no username or password. If you do not have static IP they may not be able to service you.
Looks like based on a template for 3cx they require you to use IP based registration and require you to use port 5060. You must have your public IP in the SIP VIA headers.
Looks like they use PAI (P-Asserted Identity) header for the Call display data

Likely very similar or identical to the anveo direct configuration in the BCM FAQ here





 
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Thanks QueBall780.

Gamma are very popular in the UK and yes, they require a static IP address, hence no requirement for a username and password that I'm use to using for other providers. I will try a few things today.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = linkedin
 
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After much frustration and messing about with routers and even swapping out my old BCM 50a with a standard BCM 50 unit, I somehow finally figured it out which was purely by luck. I have attached a user guide with screen shots.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = linkedin
 
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I've been battling with a customer to get Flowroute to work on their system with zero cooperation from the IT guy. He finally gave up and ran his own separate LAN just for the phone system so he could bypass a WatchGuard firewall through which the IT guy wouldn't program any port forwards to the BCM50.

Brian Cox
Georgia Telephone
 
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Yes, I've done that too. Get another static public IP and put in your own router. Everything works and I don't have to negotiate with them. Makes it much better.

 
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Try this as an example for single digit dialing...

Dialing Plan:
Dest Code 9 = Route 009 = Absorb 0
Route 009 = BlocA
Public Network DN Length = 12 (maybe 13 for UK?)
SIP Trunks

SIP Trunking:
Routing Table = Add 9
Accounts/Advanced Outbound Called Characters To Absorb = 1 (if also using 2 digit dialing such as 81, 82 etc then leave it at absorb 2)

I have noticed some have put every single digit in the Routing Table such as 1 2 3 4 5 6 7 8 9 0, this is not required and can mess things up....bad programming.
Just make sure you program both the Absorb in Dialing Plan and the Outbound Called Characters To Absorb in SIP Trunking to sync with each other.

See if that helps








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I just corrected my two lines above:

It was:
Dest Code 9 = Route 009
Route 009 = Absorb All

Correction:
Dest Code 9 = Route 009 = Absorb 0
Route 009 = BlocA



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Those are just analog converters so if you have only a BCM50 main cabinet then you are restricted to 4 ports.
And now that KRS is no longer our pricing for adding SIP trunks is actually cheaper then adding 3rd party hardware with extra power costs and BCM50 expansion cabinets and MBM's for more than 4 trunks.

The idea of having SIP trunks is you then have 12 trunks.


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Thanks for your reply. I was quoted £800 to add SIP trunk keycodes to a BCM so I went the ISDN2 to SIP converter route which cost £400. ISDN 2 expansion so, 8 x ISDN2 channels to 8 x SIP ;-)
 
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