Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 217

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
5 Data Communications
About Data and Video Communications
The ISDN terminal adapter adapts the DTE to the MLX environment. Instead of
converting digital signals to analog signals as a modem does, the ISDN terminal
adapter maintains a digital data format that allows transmission to another inside
ISDN terminal adapter station or over the PRI, NI-1 BRI, or T1 Switched 56
telephone network.
The ISDN terminal adapter can provide dialing and answering capabilities to the
data station, and can share the MLX extension jack with an MLX telephone.
An ISDN terminal adapter data station can be used to make data calls either over
digital telephone facilities (PRI, NI-1 BRI, or T1 Switched 56 facilities) or to an
ISDN terminal adapter data station inside the system.
There are different types of ISDN terminal adapter data stations depending on the
data station's capabilities:
MLX voice and ISDN terminal adapter data (digital voice-and-data)
ISDN terminal adapter data-only
Issue 1
June 1997
Page 5-11