Gregory's Server
The special linecards at the Telephone Exchange to send the metering pulses are likely to be decomissioned as everything switches from the old TDM kit to VOIP - I've not ever encountered a VOIP channel bank that can produce meter pulses and am unsure if such a thing even exists.
Its more common for the whole telephone set to be removed when payphone service is ceased in case someone expects it to be working for calling 190/112 (emergency numbers)