Case Communications syncro 1496, Reference Manual

Page: 13 / 192

1 Introduction
1.1 The Syncro 1496 Modem
The Syncro 1496 is a multi-standard autodial modem capable of passing
synchronous data at up to 14400 bps over leased (private wire) lines, and
PSTN (dial-up) lines.
The modem complies with the following ITU-T Recommendations:
V.33 14400 or 12000 bps synchronous operation.
V.32 9600 or 4800 bps synchronous operation.
V.32bis 14400, 12000 or 7200 bps synchronous operation.
V.29 9600, 7200 or 4800 bps synchronous operation.
V.22 1200 bps synchronous operation.
V.22bis 2400 bps synchronous operation.
The other principal features of the modem are:
• Synchronous full- or half-duplex operation over 2-wire leased line or
PSTN.
• Synchronous full-duplex operation over 4-wire leased line.
• Trellis coded modulation for enhanced performance.
• Near and remote end echo cancellation in V.32 and V.32bis modes.
• Automatic dialling using AT or V.25bis commands.
• An electronic storage system for telephone numbers. Numbers are
stored, and subsequently retrieved, by using the numbered buttons on
the front panel, or by AT commands.
• Automatic answering to V.25 of incoming calls. Disconnection of calls is
always completed 'cleanly' so that the modem is ready for the next call.
• Storage of up to 16 pre-set configurations.
• Comprehensive modem configuration using AT commands, which can
be from a Syncro 1496 or Syncro 1496R modem at a remote site, with
security controls to prevent unauthorised use of this facility.
X450-310851 Issue 2 1-3 Rev.1