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Basic Troubleshooting and Repair
Signaling Types
Channel Associated Signaling
T1 was originally designed to emulate 24 independent analog trunks. The
Channel Associated signaling supports Loop Start, Ground Start, DID/
Loop, and E&M trunks. The function of each channel is decided and
programmed at each end.
All handshake signaling is done with bits (A&B) taken from the bit stream
which are used to emulate the various analog trunk signals, (off-hook,
on-hook, current reversal, etc.).
Common Channel Signaling
The Handshake signaling for the first 23 channels is managed by the 24th
channel. The Common Channel signaling allows for transmission of digital
information and more advanced digital trunk applications (MITEL’s MSDN,
Bell Canada’s Megalink, ISDN, etc.). Signaling protocol is defined by the
type of service.
Test/Verify (T1)
Synchronization
Most T1 issues are a result of connectivity problems. Verify that the
incoming T1 signal is seen at both ends; verify all hardware connections.
Failure at either end indicates loss of an incoming synchronizing signal.
Loopback
Loopback is used to verify and locate the source of either a cable or a
synchronization problem through the devices in a T1 transmission path.
Devices in the T1 transmission path (PBX, CSU, Channel bank, smart
jacks, etc.) will generally have some type of loopback mode. Loopback
modes will typically have the effect of taking the input T1 stream and
transmitting the stream back to the source; the nodes thereby verify that
portion of the link.
In the absence of a loopback mode, the T1 transmits and receives pairs
that can be directly connected together to physically create a loopback
condition.
Summary of Contents for SX-200 ICP - 1.0 5020
Page 1: ...Release 4 0 CX CXi Controller TECHNICIAN S HANDBOOK ...
Page 9: ...Chapter 1 Introduction ...
Page 10: ...2 SX 200 ICP CX CXi Technician s Handbook ...
Page 24: ...16 SX 200 ICP CX CXi Technician s Handbook ...
Page 25: ...Chapter 2 Basic Installation ...
Page 26: ...18 SX 200 ICP CX CXi Technician s Handbook ...
Page 75: ...Chapter 3 Basic Programming ...
Page 76: ...68 SX 200 ICP CX CXi Technician s Handbook ...
Page 89: ...81 Basic Programming The keys on the 5412 PKM are numbered as follows ...
Page 98: ...90 SX 200 ICP CX CXi Technician s Handbook Figure 10 Administrator Mailbox Menu ...
Page 142: ...134 SX 200 ICP CX CXi Technician s Handbook ...
Page 143: ...Chapter 4 Advanced Installation and Programming ...
Page 144: ...136 SX 200 ICP CX CXi Technician s Handbook ...
Page 183: ...Chapter 5 Routine Maintenance ...
Page 184: ...176 SX 200 ICP CX CXi Technician s Handbook ...
Page 219: ...Chapter 6 Basic Troubleshooting and Repair ...
Page 220: ...212 SX 200 ICP CX CXi Technician s Handbook ...
Page 245: ...Chapter 7 Advanced Troubleshooting and Repair ...
Page 246: ...238 SX 200 ICP CX CXi Technician s Handbook ...
Page 269: ...Appendix A Default Database Values ...
Page 270: ...262 SX 200 ICP CX CXi Technician s Handbook ...
Page 326: ...318 SX 200 ICP CX CXi Technician s Handbook ...
Page 327: ...Appendix B Part Numbers ...
Page 328: ...320 SX 200 ICP CX CXi Technician s Handbook ...
Page 336: ...328 SX 200 ICP CX CXi Technician s Handbook ...
Page 337: ...Appendix C System Cabling ...
Page 338: ...330 SX 200 ICP CX CXi Technician s Handbook ...
Page 343: ...Appendix D Folio Views E Docs Tips ...
Page 344: ...336 SX 200 ICP CX Technician s Handbook ...