Specifications

Introduction
1-7
Password Protection
The Excalibur Multirate DAP provides a password protection feature to prevent users
from accessing certain front panel functions. This feature enables you to lock out any or
all of the following functions to users who do not enter the proper password:
configuration (including secondary channel configuration), remote unit control, dial
backup operation, diagnostic testing, the Digital Data Service mode, and the T7 address.
The password can be any three-character alphanumeric code.
RTS-DCD Simulation
Two user-selectable methods of RTS-DCD simulation are provided as a means of
transmitting control signaling information:
• V.13 - is only supported on synchronous ports.
• Out of Band - can be enabled on synchronous and asynchronous ports. This
method does not add bits to the user data stream and allows the use of RTS-DCD
Simulation with equipment that is sensitive to in-band signaling.
Extended Range Operation
The DAP receiver accommodates a nominal loop loss of 0 to -34 dB which complies with
the requirements of AT&T Publication 62310. The extended range feature automatically
allows operation on loops that have an attenuation rate of -40 dB for line rates lower than
56 Kbps, and -45 dB for line rates of 56 and 72 Kbps. The performance in this range is
dependent on the telephone company equipment.
Rate Adaption
Rate adaption allows the DTE interface to operate at a lower data rate than the DDS line
rate. This feature is available when the DAP is operating with the non-interruptive
secondary channel technology on Basic DDS service or Clear Channel 64 Kbps service.
Built-In Diagnostic Tests
The Excalibur Multirate DAP contains an extensive array of diagnostic tests that help you
quickly isolate the source of network malfunctions. From the local site, you can initiate
Aggregate, Channel (available for Basic DDS with non-interruptive secondary channel
mode), and port level tests on both the local and remote site DAPs. The following tests
are included:
•Self-Error