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Connecting Data Equipment
Table 6-2. Data Module Settings
Data Module
56 Kbps
64 Kbps
Settings
Auto-dial
off
off
Busy out
off
off
Datarest
on
off
DTR
follow
follow
Duplex
full
full
Mode
cs
cs
Speed
56,000
64,000
CSU DIP Switch Settings. If the customer’s system is running at 56 kbps, set
the CSU line coding DIP switch to AMI. See Chapter 4 for details.
Modem Pools
A call between an analog data station and a digital data station is possible
only if the system includes a modem pool to convert the signals back and
forth between analog and digital. A modem pool consists of one or more
modem-and-data module pairs; two pairs are shown in Figure 6-8.
Modem pools are set up as analog-to-digital or digital-to-analog:
■ Digital-to-Analog: This type of modem pool is used when a call to an
analog data station is originated from a digital station.
■ Analog-to-Digital: This type of modem pool is used when a call to a
digital data station is originated from an analog data station.
Modem Pools
6-23