Adapter Tau-PCI/32, User Manual
Copyright © 2004-2007 Cronyx
5
Deliverables
Tau-PCI/32 Adapter Board;
Two floppy disks or a CD-ROM with software;
User Manual;
Loopback plug for E1 interfaces testing;
Depending on the model, one or two DB15 connectors (male in case) for E1 lines
connection;
E1 Line Protection
Data transmission lines can be subjected to pulse disturbances generated by
electrostatic discharges, lightning and other sources.
The interface part of the E1 channels contains safety fuses and TVS matrices that
provide secondary protection of the adapter. The adapter interfaces must be additionally
fitted with primary protection devices if you use long E1 lines stretching beyond single
building.
Devices that can be used for the primary protection of E1 lines have the rated
breakdown voltage of about 7.5V and the tolerated pulse current of 200A, and small self-
capacitance.
Interior Design of the Adapter
Functionally, the Tau-PCI/32 adapter can be divided into six primary structural parts:
A transceiver that simultaneously maintains up to 32 logical channels from E1
timeslots;
E1 line interfaces; two or one interfaces can be installed depending on the adapter
model;
A nonblocking cross-connector that performs random cross switching of timeslots
between three "points": a transceiver and two E1 interfaces;
An on/off shaper of channel associated signaling (CAS) data, which allows the use
of timeslot 16 to exchange CAS signaling data, adjusted for cross switching
(absent from Tau-PCI/32-Lite);
An on/off switch of Sa-bits (Sa4…Sa8) that enables the use of timeslot 0 of the
transceiver for Sa bits exchange, and simultaneously allows Sa bits to bypass the
E1 interfaces;
On/off modules to support the unstructured mode, and scramblers for each E1
interface;
