Multipoint Applications - Paradyne Comsphere 3920Plus Installation And Operation Manual

COMSPHERE 392xPlus Modems

Multipoint Applications

In multipoint applications, leased-line circuits are used for time sharing the same front-end
processor (FEP) port with multiple remote locations. The FEP (via the control modem) regulates
traffic on the line by continuously polling the tributary DTE(s) in a predefined sequence. Only one
tributary can communicate with the control modem at a given time. Modems configured for Trellis
Multipoint (TMp) cannot be used in a point-to-point, constant carrier application. (Refer to the
Leased Line — Mux Enabled or the Leased Line — Mux Disabled section in Chapter 4 for
configuration options.)
1-2
International Support to correctly detect the call progress signals (dial tone, busy, fast busy,
ringback) for a variety of countries.
Extended data circuits with diagnostics.
With the mux enabled, four-wire/two-wire leased-line modulations: V.34 (33,600, 28,800,
24,000, 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, and 2400 bps), V.32 terbo
(19,200 and 16,800 bps), V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600
and 4800 bps), and Trellis Multipoint (TMp) (19,200, 14,400, 9600, 7200, 4800, and
2400 bps).
With the mux enabled, dial-line modulations: V.34 (33,600, 28,800, 24,000, 19,200, 16,800,
14,400, 12,000, 9600, 7200, 4800, and 2400 bps), V.32 terbo (19,200 and 16,800 bps),
V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps).
With the mux disabled, four-wire/two-wire leased-line modulations: V.34 (33,600, 31,200,
28,800, 26,400, 24,000, 21,600, 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, and
2400 bps), V.32 terbo (19,200 and 16,800 bps), V.32bis (14,400, 12,000, 9600, 7200, and
4800 bps), V.32 (9600 and 4800 bps), Trellis Multipoint (19,200, 14,400, 9600, 7200, 4800,
and 2400 bps), V.22bis (2400 bps), V.27bis (4800 and 2400 bps), V.33 (14,400 and
12,000 bps), and V.29 (9600, 7200, and 4800 bps).
With the mux disabled, dial-line modulations: V.34 (33,600, 31,200, 28,800, 26,400, 24,000,
21,600, 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, and 2400 bps), V.32 terbo
(19,200 and 16,800 bps), V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600
and 4800 bps), V.22bis (2400 bps), V.22 (1200 bps), V.23 (1200 and 600 bps), V.21
(300 bps), Bell 212A (1200 bps), and Bell 103J (300 bps).
Channel adaptive Trellis-Coded Modulation, AT&T Paradyne's advanced Trellis-Coded
transparent forward error correction for Trellis multipoint and high-speed point-to-point
applications.
Convenient migration to new or optional features through software downloading.
Extended data circuits with diagnostic capabilities.
Network management system (NMS) support through the COMSPHERE 6800 or
6700 Series NMS using Advanced Diagnostic protocol (ADp).
Automatic and manual backup with standby capabilities for 4-wire/2-wire leased-line
applications. (The backup facility may be either a 2-wire dial line or a 2-wire leased line.)
April 1995 3920-A2-GN31-10