Nortel Networks Circuit Card - Manual (Page 726)

Page 726 of 906 NTAK10 2.0 Mb DTI card
553-3001-211 Standard 3.00 August 2005
• controlling LEDs
• downloading Local Calling Areas (LCAs)
• monitoring errors and alarms
• detecting the change of state in TS0, and outputting TS0 data
• counting bipolar violations, slips, PLL alarms, frame-alignment errors,
and CRC-4 errors
• monitoring the status of frame alignment and multiframe alignment
• detecting and reporting of alarm indication signals (AIS)
• updating of per channel loopback registers
• controlling the far-end loopback and digroup loopback functions
Signaling interface
Interconnections
The external connection is through a 50-pin MDF connector with the
NTBK05 carrier cable A0394217.
CEPT interface
For the Conference of European Postal Communications (CEPT) interface,
the connection to the external digital carrier is through the NT5K85 DTI cable
assembly. It converts the 120 ohms D-connector to 75 ohms coaxial cable.
The impedance is switch set. The switch-settings table at the end of this
chapter describes the options. See Table 235.