Telephone switching systems

समान संसाधन

• Digital telephony
  द्वारा: Bellamy, John C.
  प्रकाशित: (1982)
• English for telephoning /
  द्वारा: Gutjahr, Lothanr
  प्रकाशित: (2007)
• Telephone communication in the information age
  द्वारा: Mantus, Roberta
• Effective telephoning
  द्वारा: Comfort, Jeremy.
  प्रकाशित: (1996)
• Telephoning in English /
  द्वारा: Naterop, B.Jean
  प्रकाशित: (2009)