Section 2 Functional Description And Setup; General; Table 2-1 Data Rate And Time Slot Usage - GatesAir Intraplex DA-191B Installation And Operation Manual

GatesAir
Intraplex Products
Functional Description and Setup
2.1

General

Figure 2-1 shows a simplified block diagram of the DA-191B.
The green SRVC LED lights when service is turned on for the module, even if no channel is
actually transmitting or receiving data. (SRVC will go off in an E1 multiplexer if timeslot 16 is
selected for use in a CAS formatted signal.)
The T1 switch allows the user to set the module for use in a T1 or E1 multiplexer, and the CAS
switch, used in an E1 multiplexer only, determines whether time slot 16 is reserved for CAS
signaling.
The TERM switch determines whether the module is set up for use in a terminal multiplexer or a
drop/insert multiplexer. In a drop/insert multiplexer, it also determines whether the module
communicates via the DI-A port or the DI-B port (see Section 2.5, Drop and Insert Operation).
RATE and MODE switches set the maximum data rate and whether the module uses one, two,
four, or eight time slots. Table 2-1 shows the relation between the data rate, which data ports are
activated, and the number of time slots required. The TIME SLOT SELECT switches determine
which time slot(s) are used.
Maximum
Data Rate
38.4 kbps
38.4 kbps
38.4 kbps
19.2 kbps
19.2 kbps
19.2 kbps
9.6 kbps
9.6 kbps
2
DA-191B Four-Port Asynchronous Data Module
Section 2
Table 2-1
Data Rate and Time Slot Usage
Active Ports
1
1 and 2
1 to 4
1
1 and 2
1 to 4
1 and 2
1 to 4
Time Slots Required
2
4
8
1
2
4
1
2
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