It's going to be interesting to hear the result of this. The ONT can support up to 1Gb/s on both lines and speed tests would show that. It can't support 2Gb/s aggregated across the lines. Going to be interesting to see how they respond as it seems the ONT is not suitable to providing 2 services but I have a feeling they are going to argue that both individual lines can perform up to the promised speeds - also, can't remember what the "guaranteed speed" is for 1Gbps but if it is less than 500Mbps then the ONT can deliver it on both lines at once.

I think this should be resolvable if you can get them to give you a new Nokia 4-port ONT. Openreach offer that as a paid-for upgrade; maybe your ISP will either do it for free, or order it and pass on the cost.

Otherwise, I guess you could upgrade one of the lines to a 1.2G or 1.8G service (which not many providers offer yet - EE and ??). That would force them either to upgrade the ONT, or put in a separate 2.5G ONT for that service, and leave the old 4-port for the other one (with a separate cable to the CBT)

Seriously these are the sort of things that make ISPs and Openreach look amateurish, 1.8Gbps of connections going into a 1Gbps backplane. The ISP needs to sort this out with solutions suggested by other contributors.

In reply to a post by ian72:

It's going to be interesting to hear the result of this. The ONT can support up to 1Gb/s on both lines and speed tests would show that. It can't support 2Gb/s aggregated across the lines. Going to be interesting to see how they respond as it seems the ONT is not suitable to providing 2 services but I have a feeling they are going to argue that both individual lines can perform up to the promised speeds - also, can't remember what the "guaranteed speed" is for 1Gbps but if it is less than 500Mbps then the ONT can deliver it on both lines at once.

I have direct contact with the BT lady who placed the order. She was very helpful so I'll raise the issue with her and see what she says.

The order confirmation emails for both lines say "Let us know if your download speed falls below your minimum guaranteed speed (700 Mbps)", so I think there's a valid case that the ONT simply can't provide the minimum guaranteed speed.

I'll report back when I get a response from BT.

David

OK. So far so good.

Just spoke to BT and, apart from being on hold for an eternity, their response was very good. They've agreed to replace/upgrade the ONT (at no charge) and an Openreach engineer is due to be here tomorrow! If all goes to plan then I'll be a happy boy.

I'll let you know how it goes.

David

That all sounds positive, hopefully you get a real Openreach engineer with a Nokia 4-port ONT. Don't sign off on the job being completed if they show up with the same one you have and it doesn't improve anything, push back so they mark the task as not completed and then maybe someone else can have a look.

That is good news and is what would be hoped for, glad they didn't try and justify that both lines were capable of the speeds when used separately.

In reply to a post by jpm:

That all sounds positive, hopefully you get a real Openreach engineer with a Nokia 4-port ONT. Don't sign off on the job being completed if they show up with the same one you have and it doesn't improve anything, push back so they mark the task as not completed and then maybe someone else can have a look.

Is it only the Nokia 4-port that will suffice? Are the Huawei and Nokia the only options they offer or are there others? I will certainly say no to another Huawei (and I was very clear on the phone to BT that an upgrade is needed, not a replacement) but are there other makes/models they might install that will also do the job?

In reply to a post by Josser:

Is it only the Nokia 4-port that will suffice? Are the Huawei and Nokia the only options they offer or are there others? I will certainly say no to another Huawei (and I was very clear on the phone to BT that an upgrade is needed, not a replacement) but are there other makes/models they might install that will also do the job?

AFAIK, the Nokia is the only new 4-port ONT used by Openreach, but if they happen to offer you something else you can quickly Google it.

The other solution would be to give you two standalone 1-port ONTs, of any type - but that would involve pulling another cable back to the CBT.

If this is a residential FTTP product it's probably using GPON which can have contention ratios of up to 1:128 and each port is good for 2.5Gb/s

When testing both lines they may well be contending with each other!