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In Telesis systems, basic and primary rate ISDN interfaces are according to ETSI and ITU-T standards. QSIG ISDN D channel protocol is an ECMA (European Computer Manufacturers Association) derivative

For ISDN DSS1 Basic Rate (BRI) in PX24M, PX24X, and X1 systems, the types of interfaces supported are:

  • S0 interface
  • T0 interface

Both point-to-point and point-to-multipoint connection schemes are provided.

For ISDN Primary Rate (PRI) in PX24X, X1 and Stillink systems, the types of interfaces supported are:

  • DSS1 Euro ISDN TE (terminal side)
  • DSS1 Euro ISDN NT (network side)
  • ECMA QSIG TE (terminal side)
  • ECMA QSIG NT (network side)

The physical layer of primary ISDN access in Telesis systems is an E1 (ITU-T G.703) interface. 120 ohm balanced terminations are supported on any E1. The line code is HDB3 or AMI programmable. CRC4 may be enabled or disabled.

Basic Rate ISDN interfaces are S0/T0. The connector type for S0/T0 is RJ45. Point-to-point and point-to-multipoint connection schemes are possible. With point-to-multipoint connections, both short and extended passive buses are supported.

Several parameters in ISDN messages are programmable. Those are:

  • Calling-party number
  • Calling-party category
  • Calling-party type of number
  • Calling-party numbering plan
  • Calling-party presentation indicator
  • Calling-party screening indicator
  • Called-party number
  • Called-party numbering plan
  • Called-party type of number (fixed)
  • Called-party type of number (automatic by analyzing the called-party number)
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Page last modified on April 18, 2013, at 01:34 AM EST
Subject to change without any notice. All rights reserved 2010 - Telesis A.S.
Iskitler Cad. No.68 Ankara, TURKEY. Tel: +90 312 3840540 Fax: +90 312 3840549