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Features and services Page 63 of 80
Meridian Data Services Description
Feature Requirements The TDN feature requires the following:
• QPC720 card in either DTI or PRI mode
• PRI trunks must use either TDN routes or ESN19
Limitations Point-to-point protocols, such as DM-DM, an NT proprietary
protocol, are not supported by TDN. Refer to the feature description for a list
of data modules and protocols that are supported by TDN.
Refer to Transparent Data Networking (553-2731-110) for detailed
information on this feature.
Meridian Communications Unit
Description The Meridian Communications Unit (MCU) allows you to
transmit and receive data using either PSDS over the public network or a
private network. The MCU, which replaces the QMT21C, is designed for
domestic and international use, with transmission speeds up to 19.2 Kbps
asynch and 64 Kbps synch, integrated display, and self-diagnostics. The
MCU supports Autodialing, Ring Again, and Speed Calling, as well as
autobauding and automatic parity detection. You can use the MCU for
• Video conferencing
• LAN bridging
• Bulk data/PC file transfer
• Dial back-up
• Host connectivity
The MCU fully complies with RS-232-C and can be configured as DCE or
DTE to connect to a terminal, printer, or fax machine.
Unlike the MCA, the MCU provides a dedicated call key and call progress
tones. The MCU also permits smart modem pooling.
The MCU supports the DM-DM, T-Link, V.25 bis, and PSDS interfaces, as
well as the RS-232-C, CCITT V.35, CCITT V.24, and RS570/RS3449 (with
different cables) interfaces. It complies with V.28 for European approval.