AVAYA trunk SIP and SBC

[abtt]

Hello,

we want to migrate our T2 on SIP trunk.
Currently, we have 2 T2 links on an Avaya gateway.which is also connected to our core network

We also use an sbc for teleworkers (which goes through the main internet link).

We are going to buy 2 SIP trunk links. We want to install them in 2 different buildings (connected by our own fiber optic).
We would like to do active / passive.
These 2 links will be for telephony only.

In the schema sent by the operator company, there is an sbc on their side. I asked them if we should also have an SBC on our side? But the answer is not clear? I also asked the question to our integrator who sold us the AVAYA solution, for him, it is not necessary. The operator routers are directly connected to our gateway.

 

[biglebowski]

Personally I would always deploy SIP trunks with an SBC.

If the SIP trunks have a public IP then 100% yes use an SBC, if they are MPLS (point to point on a private network) from the supplier then it's not so important.

 

[dialtonebone]

You should use an SBC in all scenarios where you are connecting to a infrastructure you don't no control or trust. I would definitely put an ASBCE between any ISP and your environment. It adds some flexibility and features you may find useful too for routing/codecs/formatting of SIP messages that you will never get from other methods of connecting without an SBC.

Your ISP will only know of your SBC, and everything past it will be mystery to them - that's a good thing.


edit: I'm curious what your ISPs final hand off is. You said "directly to the gateway". Are you getting PRI handoffs? Or are they handing off SIP? If SIP, then what I said above stands true. If something else... share that here and we can probably help.

 

[abtt]

Hello,

thank you for your answers.

For the architecture proposed by the ISP, it's an VPN MPLS IP network.
They only gave me a commercial diagram, where we see an SBC on their side.


yes, I agree, the only problem is that I don't know if my integrator (those who sold me the avaya system) and who are in charge of setting it up) have a good command of the SBC configuration.
The second point is that on the 1st SIP link ( active), we can technically put an sbc (VM), because I have esx servers here.

The second link ( passive) would arrive in another place, 2 km away, but without a physical server to put an sbc directly there. The 2 sites are connected by a proprietary optical fiber, so I think I could put the 2 SBCs on the same side.