AT&T System 25 - Manual (Page 7)

Your telephone company may make changes in its facilities, equipment,
operations, or procedures that could affect the proper functioning of your
equipment. If they do, you will be notified in advance to give you an opportunity
to maintain uninterrupted telephone service.
HEARING AID COMPATIBILITY
The voice terminals described in this manual are compatible with inductively
coupled hearing aids as prescribed by the FCC.
FCC INFORMATION
FCC REGISTRATlON lNFORMATlON
Registration Number AS593M-71565-MF-E
Ringer Equivalence 0.5A
Network Interface RJ21X, RJ2GX or RJ48X
PRIVATE LINE SERVICE
Service Order Code
●
Analog 9.0F
●
Analog (R3) 9.0Y
●
Digital (R3)
I
6 . 0 Y
Facility Interface Code
●
Tie Lines TL31 M
●
Off-Premises Stations OL13C
●
Digital D4 Framing 04DU9-B
●
Digital ESF 04DU9-C
November 1995