Yes,
isdn (BRI)basic rate interface has some terminals (TE), like isdn phones, fax G4, isdn 64k PC board for data, videoconference, etc.
So "any" isdn phone will do, to tests your dsl.
If the wiring is correct and the equipments are with power,
Layer1 (L1-physical) should be UP, layer2(L2- data link) depending on the terminal configuration if they are PMP or PP , could only goes UP when you start a call.
It's important that the DSL config PRID is the right option for the terminal. for Layer 3 - DCH to ESTabelish
1 ANSI
2 ETSI
3 DMS
4 NET64
5 Numeris
6 NI-1