BT Caller Display 30 not showing caller-id after Digital Voice upgrade

[Taffia]

Just been switched to Digital Voice and my Caller Display 30 (Yes I know it is a bit ancient) no longer shows the callers number. Shows nothing at all. I rely on it !!!.

It is plugged into the green phone port of the Smart Hub 2 and a not quite so ancient BT relate 80 phone is plugged into the Caller Display 30.

When I phone my home number from my mobile (on the ASDA/Vodaphone network) my home phone rings but no caller id shows. The same happens if I dial 17070 and choose option 1.

Do I need to do something to enable Called Id in MyBt ?. If so what ?. I cannot see any Caller Id options in MyBt.

PS I always thought that any existing internal extension wiring would still work if it is simply disconnected from the BT master socket and merely connected to the Smart Hub 2 Green phone socket but the Openreach engineer was adamant that only a single analogue phone could be plugged into the green analogue port. Which answer is correct ? 

[jac_95]

Hi Taffia,

Thanks for the post and welcome to the Community.

This is an automated response as I can see you have a question about BT’s Digital Voice service. Rather than waiting for a response from the Community, you may find an answer to your question by using the search bar on the Community homepage. We also have a thread that contains a wealth of info related to BT’s Digital Voice, click this link to take a look, Digital Voice FAQs.

Got some questions or want to learn more about BT’s Digital Voice rollout? BT are running localised events as part of the regional rollout of Digital Voice - Click here to view the Digital Voice events

To learn more about the nationwide change to this Internet based voice service visit landlinesgo.digital

If you have already looked for the answer to your question and have not found anything that can help, then please ignore this message. One of our Community members will be along shortly to help you further.

[rbz5416]

There should be a Digital Voice section under MyBT > Your Products & Caller Display should be in there. If it shows as already enabled, disable it & log off for a few minutes. Then log back on & re-enable it.

[Taffia]

All I can see is Call Protect, Call Barring, Voicemail essentials and Call Barring, and the last two show [add now] the other two show [manage]

Nothing else.

I have since discovered that despite having enabled automatically previously, with Digital Voice it is now necessary to order it (even though it is free !!!) and wait 24 hours to get it back.

Utterly wierd requirement.  

[rbz5416]

Are you sure you're looking in Digital Voice & not the old Landline?

[Keith_Beddoe]

I think you may find that the  BT Caller Display 30 is incompatible with the current phone network, in fact it did not work on certain exchange types.

I think it may have to do with it needing a line polarity change, prior to the incoming CLI data burst, whereas the modern phones simply look for the data stream, which is sent just before the first ring. That allows blocking phones to supress any ringing if the number is blocked.

The line polarity reversal is a hangover from the old Strowger mechanical exchanges, and was replicated on crossbar and electronic exchanges.

BT Digital Voice does not have this feature, as its no longer needed.