Datatek DT-4180 - Manual (Page 83)

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13.11 Cabling to a DPS Network Telemetry Processor (NTP)
The 4000XA, 4180, 4280, 9480 and the 4284 all provide support for a non-standard
variant of the E2A protocol used by the DPS NTP.
The DPS Network Telemetry Processor (NTP) is a replacement for the AT&T General
Telemetry Processor (GTP). The NTP consists of three shelves: A control Shelf (Shelf
1), a discrete point shelf (Shelf 2), and a TBOS serial shelf (Shelf 3). The internal
modem used for E2A transport to the NTP resides in shelf 2 and is connected to the
control shelf via a DB9 labeled P3 on the back of the control shelf. This “Modem” card
substantially alters the E2A protocol.
Connection of the DPS NTP to the virtual bridge network is as follows:
Remove the DB9 cable from P3 on the control shelf.
Attach a null modem DB9 Male to DB25 Male to P3 on the Control Shelf.
If using a 4000XA, 4180, 4280, or 4284; attach a DB25 Female Asynchronous DCE
adapter to the DB25 end of the DB9 to DB25 cable.
If using a 9480, attach it directly to the DB25 end of the cable since it provides a female
DB25 DCE interface.
The DPS “Modem” card is no longer required and may be removed from the shelf.
The configuration of the port is as follows:
Port <port num> type=orig prot=dps
Port <port num> dest=<
E2AHOB IP Address> dport=< E2AHOB TCP Port>
Rs <port num>
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.