The ATM I/O is an SELV port and must be connected only to an SELV service.
All cabling connected to telecommunications ports must be TS 008 compliant.
Inherent delays in packet-switched technology prevent the CX950 from meeting
certain Standard Telephone Service requirements as defined by the
Telecommunications Act 1997. For this reason, it is recommended that local
outgoing calls should not be routed through the CX950.
An FXS port must not be connected to non-switched lines of the
telecommunications network (leased lines). All devices connected to an FXS port
must be collocated with the CX950 system. Furthermore, intra-building
connections to an FXS port must not share the same cable sheath as cabling
carrying Telecommunications Network services. Such connections must either be
separately routed or individually screened (shielded).