Maybe a telephone exchange or some kind of social identification.

或许是电话号码或某种社会编码。

youdao

The nervous system of the body bears some analogy to a telephone exchange.

人体的神经系统与电话局有某些相似之处。

youdao

He talked, in particular, of a telephone exchange in Canberra called 'Deacon Center'.

他谈到，特别是电话交换在堪培拉所谓'迪肯中心'。

youdao

LLUs use equipment installed in a telephone exchange by a third party company, such as Orange, instead of BT.

BBC: NEWS | Technology | Orange broadband hit by outages

When there were telephone exchanges, the mind was like a telephone exchange, and, in the same period, since the nickelodeon reigned, moving pictures were making us dumb.

NEWYORKER: The Information

Many rural communities are several miles from a telephone exchange - too far for high-speed broadband to work - while satellite connection for high-speed access is very expensive and carries the risk of added technical problems.

BBC: High speed rural broadband hope