Telephone switching systems, Electronic.

[NT 60487] Overview

[NT 60478] Works:	1 [NT 60520] works in 1 [NT 60521] publications in 1 [NT 60522] languages

[NT 60480] Titles

Signaling system No. 7(SS7/C7) : protocol, architecture, and services [NT 59711] by: Hewett, Jeff; Dryburgh, Lee ([NT 1579] Language materials, printed)