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Figure 1-1.
Model 2240
Modem
1. Description
1.1 2240 Modem
The 2240 is a full-featured modem for full-duplex operation over fiber optic cable.
The 2240 is available in Standalone and Rack-Mount models.
The 2240 modem operates at speeds from DC (0 bps) to 1.500 Mbps in asynchronous
mode, 0 bps to 2.050 Mbps in synchronous mode (depending on the Rate and Mode
selection refer to Section 3), including the common rates of 1.536 Mbps, 1.544 Mbps,
and 2.048 Mbps. Refer to Section 2, "Installation," for further details.
The 2240s are intended to operate with one of a wide variety of electrical interfaces, as
listed below.
RS-423 / 232
RS-449
RS-449 / RS-423 (MC1)
RS-530
Twinax 422
Twinaxial Mil-Std 188-114C
Various configurations of the 2240 provide local and end-to-end modem controls
including those listed in Table 1-A.
2240 Fiber Optic Modem
CCITT V.35
Transparent T1 / E1
CCITT V.35 / RS-423 (MC2)
Programmable RS-422
TTL / BNC
DC-37 Mil-Std 188-114
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