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Configuring WAN Line Services
6-4
117345-B Rev. 00
An ESF frame comprises 24 D4 frames. A D4 frame contains one framing bit. An
ESF frame contains 24 framing bits that it uses for the following purposes:
• Synchronization (6 bits)
• Error checking (6-bit CRC)
• Diagnostic data channel (12 bits)
By default, the T1 interface uses ESF format. Set the frame type for this interface.
See the Frame Type parameter on page A-74 for information.
Enabling or Disabling Bipolar with 8 Zero Substitution (B8ZS)
T1 uses bipolar format for signals. In bipolar format, alternating positive and
negative pulses on the digital line signify the number 1, and the absence of a pulse
signifies 0 (Figure 6-2).
Figure 6-2. Bipolar Format
In bipolar format, a negative pulse must always follow a positive pulse, and vice
versa. A long string of zeros on a T1 line would cause the line to lose
synchronization due to lack of pulses. Bay Networks offers B8ZS for T1
synchronization.
Line voltage
Data
11 10000
0
+3V
-3V
0
LS0009A
- Configuring 1
- WAN Line Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117345-B Rev. 00 10
- About This Guide 19
- Before You Begin 20
- Conventions 20
- Acronyms 21
- Bay Networks Customer Service 24
- How to Get Help 24
- Chapter 1 27
- Getting Started 27
- To edit a circuit: 33
- Figure 1-4. Edit Lines Window 34
- Chapter 2 35
- Setting the BofL Timeout 41
- Setting the MTU 41
- Configuring Clocking Signals 43
- Setting the Signal Mode 45
- Setting Minimum Frame Spacing 49
- Setting the CRC Size 52
- Setting the Signaling Method 54
- Setting the Line Coding 55
- Configuring KG84A Security 55
- Setting the Retry Count 59
- Setting the Link Idle Timer 60
- Setting the Cable Type 61
- Setting the Retry Timer 61
- Setting a Priority 62
- Setting the Hold Down Time 63
- Setting the IFTF Pattern 65
- Chapter 3 77
- Asynchronous Services 77
- for information 78
- Setting the Remote IP Address 79
- Specifying the Remote Port 80
- Specifying the Local Port 80
- Setting the Idle Timer 81
- Chapter 4 83
- Setting the Option Mode 85
- Loopback Test Modes 89
- AN/ANH/ARN 90
- Chapter 5 93
- Enabling or Disabling BofL 96
- Using the BCC 100
- Using Site Manager 100
- Configuring HSSI Services 101
- Chapter 6 103
- Editing T1 Services 104
- Setting the T1 Frame Type 105
- Configuring WAN Line Services 106
- Figure 6-2. Bipolar Format 106
- Specifying Line Buildout 107
- Assigning Channel Functions 108
- Editing E1 Services 109
- Enabling or Disabling CRC 111
- Setting the Clock Source 111
- Chapter 7 113
- Setting the Clock Parameters 116
- Configuring a DS0A Connection 129
- Setting Parameters 131
- Table 7-2 132
- Defining Logical Lines 133
- (MCT1 Example) 134
- Circuit Name: MCE1_31_1 135
- Circuit name: MCE1_231_1 135
- (MCE1 Example) 136
- See the following sections: 137
- Caution: 139
- Assigning Timeslots 144
- About the Tests 149
- Setting Port Test Parameters 150
- Running Port Tests 153
- Running Logical Line Tests 158
- Send Command Function 159
- Chapter 8 161
- Configuring FT1 Services 161
- Configuring an FT1 Port 162
- Defining Logical Line 172
- Circuit name: 174
- Chapter 9 189
- Types of Multiline Circuits 190
- Multiline Example 191
- Software Considerations 192
- Logical Lines (MCE1 Example) 205
- Appendix A 209
- Asynchronous Line Parameters 210
- DSU/CSU Parameters 216
- E1 Line Parameters 218
- HSSI Line Parameters 221
- LAPB Parameters 226
- MCE1 Port Parameters 233
- MCT1 Port Parameters 237
- FT1 Port Parameters 252
- FT1 Logical Line Parameters 258
- Synchronous Line Parameters 263
- T1 Line Parameters 282
- Glossary 287
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