Telephony Signaling

(last updated: 16-May-2015 09:31)

Technical Specifications

  1. See section on "Telcordia Technologies (formerly Bellcore) Documents" for Bellcore documents on Signaling, including:
             TR-TSY-000450:  Dual Tone Multifrequency (DTMF)
             GR-506-CORE:    Signaling for Analog Interfaces
  2. See section on "ITU-T Q-Series Recommendations", for ITU-T recommendations Q.1 thru Q.180 and Q.310 thru Q.699.


  1. Signalling in Telecommunications Networks; Samuel S. Welch; Peter Peregrinus Ltd., England, 1981.
  2. Telecommunications Primer: Signals, Building Blocks and Networks; E. Bryan Carne; Prentice Hall, 1995.

Periodical Articles and Conference Papers

  1. "DX Signaling: A Modern Aid to Telephone Switching", BLR 38:6 Jun 1960 pgs 216-220.
  2. "Signaling Systems ... An International Concern", BLR 48:1 Jan 1970 pgs 13-18.
  3. "An Introduction to the CCITT R2 Signalling System", POEEJ 71:1 Apr 1978 pgs 37-43.
  4. "Signaling Systems", NEC'83 pgs 165-174.