Datatek DT-4180 - Manual (Page 82)

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13.10 Cabling to an AT&T Telemetry Network Controller (TNC)
The AT&T Telemetry Network Controller (TNC) is an E2A head of bus for multiple GTP
and NTP remote interfaces. Although all the devices covered in this document are able
to support E2A on any of its ports, the special requirements of the TNC limits its
interface to the 9480 and the 4284 at this time.
The AT&T TNC presents a DB25 Male connector. The adapter used to connect to the
AT&T TNC is the standard asynchronous DCE with a DB25 female.
When a 9480 is used, it is connected directly to the AT&T TNC without special cabling.
The configuration of the port is as follows:
Port type=
E2AHOB
Port dxe=dce swcar=on
Rs
Due to the nature of TNC to GTP traffic, the
E2AHOB is the only vertical service that
may be used to create the virtual bridge network. The IP-E2A application may not be
used for this function. This restriction applies only to AT&T GTP, the DPS NTP, and the
AT&T TNC endpoints.