Case Communications syncro 1496, Reference Manual

Page: 141 / 192

Appendix A Modem Specification
This appendix reflects the UK modem specification. Please refer to the
appendix entitled Country-Specific information to check if your modem
variant differs from this specification.
Transmitter/Receiver
Modulation 16 state V.22bis and 4 state V.22 compliant.
128 state V.32bis, 64 state V.32bis and 16 state
V.32bis compliant.
128 state V.33 and 64 state V.33 compliant.
32 state V.32 TCM compliant.
16 state V.32 and 4 state V.32 compliant.
16 state QAM V.29 compliant 9600/7200/4800 bps.
Receive levels 0 to –43 dBm.
Carrier Threshold –16 dB to –48 dB. DCD level programmable.
Operation 4-wire full duplex.
2-wire full duplex.
2-wire simulated switched carrier.
4-wire simulated switched carrier.
Modes 4-wire private line, one call dial backup.
2-wire private line, one call dial backup.
Output level Selectable –2 dBm to –15 dBm. (UK versions set to
–9 dBm for PSTN operation or –13 dBm for leased
line).
Data Format Synchronous.
Data Input Serial binary. Complies with ITU-T V.28.
Accepts levels
+
3 volts to
+
25 volts (space), and –3
volts to –25 volts (mark).
Single wire ground return.
3000 to 7000 ohms load.
X450-310851 Issue 2 A-1 Rev.1