INSTALLATION
Install
DS1
DS1 signaling allows a digital connection between the System 25 and other
PBXs, Central Offices, Toll Offices, off premise stations, and data end points
such as host computers. The TN767 emulates ground start, Ioopstart, tie and
DID Trunks in addition to off premises stations. The ZTN131 circuit pack
provides the required digital synchronization.The TN748 circuit pack will provide
the Touch Tone registers.
The term synchronization refers to an arrangement where by digital facilities
operate from a common clock. This allows the receiving facilities to keep the
digital signals in step or synchronized. Synchronization can be provided by the
system 25 any other PBX it is connected to, or by the CO being used by the
network, Synchronization must be properly engineered before installation is
begun. Each node must be aware of the synchronization plan so that it may be
properly administered.
The TN767 circuit pack generates a signal that is shaped in a manner that when
it reaches the cable it conforms to power specifications. The level of the signal
must be adjusted according to the cable distance. If the DS1 Interface
terminates at the cross connect field or at a CSU, the total cabling distance must
be used. If the DS1 Interface terminates on another PBX (direct connection), a
phantom point midway between the two PBXs should be used as the reference
point. The line equalization/compensation for S25 is set via administration
procedures from the SAT.
Connect S25 to Another On Premises PBX
When the S25 and the other PBX are in the same building, the cabling is broken
down into three different distance ranges. The first connection is for distances of
1310 feet or less. The second distance range is 1311 to 4310 feet which
requires the use of a Customer Service Unit (CSU) equipped with an Office
Repeater. The third distance range is greater than 4311 feet. It uses a CSU and
T1 line repeaters as required.
Direct Connection—Less Than 1310 Feet
Figures 2-19 and 2-20 show two different direct connections. Figure 2-19 is
normally used for connecting a S25 to another PBX that is virtually side by side.
Figure 2-20 is used for direct connections that involve more distance. Figure
2-20 shows two S25s but a DEFINITY G1 or G2, System 75, or System 85 can
be connected directly to the S25. Consult the System 85 installation manual
(555-103-104) or the DEFINITY G1 Wiring Guide (555-204-111) or the System
75 Wiring Guide (555-200-111) for the connection information for those PBXs.
2-53
Содержание Network Adapter 25
Страница 1: ...AT T AT T System 25 Installation and Maintenance Manual 555 540 103 B November 1995 ...
Страница 18: ...APPENDIX F Administration Error Messages GLOSSARY I N D E X F 1 G 1 I 1 viii ...
Страница 29: ...INSTALLATION NOTE 9 WIDE MOUNTING CENTERS ARE 8 1 2 APART FLANGES OVERLAPPED Figure 2 1 10B ETU 2 5 ...
Страница 31: ...INSTALLATION MOUNTING CENTERS WHEN FLANGES ARE OVERLAPPED Figure 2 2 617A Panel 2 7 ...
Страница 33: ...INSTALLATION Z21OA1 ADAPTER Y ADAPTER WP90851 L1 858A ADAPTER Figure 2 3 SIP Adapters 2 9 ...
Страница 50: ...INSTALLATION Figure 2 10 Three Cabinet System Front View With Covers Removed 2 26 ...
Страница 51: ...INSTALLATION Figure 2 11 Position of Shorting Plugs on CPU Memory Circuit Pack 2 27 ...
Страница 72: ...INSTALLATION UPPER ADAPTER MOUNTING CLIP Figure 2 18 Mounting Adapters ...
Страница 85: ...INSTALLATION 2 61 ...
Страница 92: ...INSTALLATION 2 68 ...
Страница 103: ...INSTALLATION Figure 2 32 10B Emergency Transfer Unit 2 78 ...
Страница 104: ...INSTALLATION Figure 2 33 Emergency Transfer Unit Connections 2 79 ...
Страница 109: ...INSTALLATION Figure 2 35 Attendant Console With DXS Console 2 84 ...
Страница 146: ...INSTALLATION 2 119b This page intentionally left blank November 1995 ...
Страница 153: ...INSTALLATION This page intentionally left blank 2 124b November 1995 ...
Страница 156: ...Figure 2 57 278A Adaptor Plug Positions for Connecting TN763 Circuit Pack to Paging System 2 127 ...
Страница 223: ...MAINTENANCE Figure 4 2 Clearing Supply Troubles Sheet 1 of 2 4 47 ...
Страница 224: ...MAINTENANCE Figure 4 2 Clearing Power Supply Troubles Sheet 2 of 2 ...
Страница 225: ...MAINTENANCE Figure 4 3 Clearing CO Trunk Troubles 4 49 ...
Страница 226: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 1 of 4 4 50 ...
Страница 227: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 2 of 4 4 51 ...
Страница 228: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 3 of 4 4 52 ...
Страница 229: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 4 of 4 4 53 ...
Страница 231: ...Figure 4 6 Clearing Tie Trunk Troubles Sheet 1 of 5 4 55 ...
Страница 232: ...MAINTENANCE 6 7 8 9 10 Figure 4 6 Clearing Tie Trunk Troubles Sheet 2 of 5 4 56 ...
Страница 233: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 3 of 5 4 57 ...
Страница 234: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 4 of 5 4 58 ...
Страница 235: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 5 of 5 4 59 ...
Страница 236: ...MAINTENANCE Figure 4 7 Clearing Paging Equipment Troubles ...
Страница 250: ...MAINTENANCE Figure 4 9 System Cabinet Backplane Wiring Side Sheet 2 of 2 4 74 ...
Страница 251: ...MAINTENANCE Figure 4 10 TDM Signal Designations on Cabinet Backplane 4 75 ...
Страница 252: ...MAINTENANCE Figure 4 11 Power Designations on Cabinet Backplane 4 76 ...
Страница 263: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 1 of 3 ...
Страница 264: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 2 of 3 4 87 ...
Страница 265: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 3 of 3 4 88 ...
Страница 271: ...MAINTENANCE Figure 4 13 Clearing Switched Loop Attendant Console Troubles Sheet 1 of 5 ...
Страница 272: ...MAINTENANCE 4 13 Clearing Switched Loop 2 of 5 Console Troubles Sheet 4 95 ...
Страница 273: ...MAINTENANCE Figure 4 13 Clearing Switched 3 of 5 Loop Attendant Console Troubles Sheet 4 96 ...
Страница 274: ...MAINTENANCE 4 13 Clearing Switched 4 of 5 Console Troubles 4 97 ...
Страница 305: ...APPENDIX C System Additions or Changes Figure C 1 Typical System 25 Port Circuit Pack C 4 November 1995 ...
Страница 321: ...APPENDIX E Administration Codes and Data This page is intentionally blank E 2 b ...
Страница 341: ...APPENDIX E Administration Codes and Data Table E J MET Set Button Defaults Cannot be changed E 22 ...