GB1139740A - Improvements in or relating to automatic telephone exchanges - Google Patents
Improvements in or relating to automatic telephone exchangesInfo
- Publication number
- GB1139740A GB1139740A GB5078466A GB5078466A GB1139740A GB 1139740 A GB1139740 A GB 1139740A GB 5078466 A GB5078466 A GB 5078466A GB 5078466 A GB5078466 A GB 5078466A GB 1139740 A GB1139740 A GB 1139740A
- Authority
- GB
- United Kingdom
- Prior art keywords
- automatic telephone
- mry
- mrx
- rectifiers
- nov
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
1,139,740. Party line systems. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 6 Nov., 1967 [11 Nov., 1966], No. 50784/66. Heading H4K. In the arrangement which caters for twoparty lines in the cross-bar system described in Specification 1,102,151, and in which the idle party is prevented from intrusion on a connection by means of rectifiers MRX, MRY, one connected to the A wire, the other to the B wire (Fig. 5, of that Specification), provision is made for revertive calls by means of a ring- back relay set RBRS which is taken into use in response to an appropriate digit and which performs the usual function of ringing both parties and also operates relays RCX, RCY to shunt out the rectifiers MRX, MRY, the relays being held subsequently by feed current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5078466A GB1139740A (en) | 1966-11-11 | 1966-11-11 | Improvements in or relating to automatic telephone exchanges |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5078466A GB1139740A (en) | 1966-11-11 | 1966-11-11 | Improvements in or relating to automatic telephone exchanges |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1139740A true GB1139740A (en) | 1969-01-15 |
Family
ID=10457326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5078466A Expired GB1139740A (en) | 1966-11-11 | 1966-11-11 | Improvements in or relating to automatic telephone exchanges |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1139740A (en) |
-
1966
- 1966-11-11 GB GB5078466A patent/GB1139740A/en not_active Expired
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