Even today, telephony services such as Plain Old Telephone Services (POTS), which is the standard telephone service that most homes use and Integrated Services Digital Network (ISDN), remain an important source of income for service providers.
There are still many legacy systems in service that provide these services- such as Siemens Fastlink, an Access technology that provides POTS, ISDN, Leased Line and ADSL services across Europe.
Siemens describe Fastlink as a Multi-service Access System for Telephony, Data and Broadband Services.
Card product code: S42024-A1869-A1-09.
Card name: SUB162