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The
TELESYNC TSI-1569 ISDN Termination Unit can be used in four different
modes.
Test
Mode: The TSI-1569 provides a dial-up means of automatically
looping back or generating BERT patterns on any or all of the 23
DS-0 B channels in an ISDN PRI (23B+D) DS-1 data stream. The ISDN
Termination Unit can be used to test SW56, SW64, Nx56/64 kb/s, H0,
and H11 with a slave TSI-1569-2 (controlled by the Master Unit D-Channel).
The TSI-1569 uses the ISDN D-channel to accept or originate calls
using Q.931 protocol. In addition to call termination, call origination
and BERTS measurements, the TSI-1569 captures up to 1000 D-channel
messages and saves them in a log file.
Thru
Mode: The TSI-1569 can be installed in the customer DS-1 PRI
line (either central office or customer location) to monitor the
bidirectional D-channel protocol. Access and control is through
the RS-232C interface or dialed up through a B-channel using a TSI-1569
or equivalent.
Cross
Connect Mode: The TSI-1569 functions as a network element to
terminate the Switch (Network) D-channel and cross connect the Network
calls to the DXC DS-1 based on called phone numbers. The TSI-1569
can also perform Mode 1 bonding of the incoming calls before cross
connecting. The Cross Connect capability is used to interface ISDN
dial-up services to packet or dedicated DS-1 networks.
Monitor
Mode: The TSI-1569
functions as a two channel Protocol Analyzer connected to the Digital
Cross Connect (DCS) in the C.O. The PRI from the ISDN switch and
the CPE are bridged into the TSI-1569. The Monitor Mode is used
to capture, log and analyze the D-Channel protocol transactions
from the Switch and the Customer directions. This is a useful mode
when the customer is having problems originating and/or receiving
calls.
Expanded
Overview & Features
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