Configuring a DS1 Interface

You can configure DS1 interfaces on CT3, CT1, and CE1 line modules.

• CT3 modules are made up of three DS3 line interfaces. Each DS3 line interface multiplexes 28 asynchronous T1 (DS1) channels.
• CT1 modules have 24 T1 channels
• CE1 modules have 20 E1 channels

To configure a DS1 interface:

1. In the Instance Explorer, navigate to the DS1 level.
2. Select the DS1 interface that you want to configure, right-click, and select Configure.

The DS1 Config tab appears in the work area.

3. Set the DS1 configuration parameters (Table 48).

 Table 48:  DS1 Configuration Parameters 

 Field
 Description

 Name

 Identifier for the interface; generated automatically


 Alias

 Description of the interface; 0-15 characters; default: blank


 IfIndex

 Identifier for the interface on a particular line interface; generated automatically


 Operational

 Current operational status of the interface


 Administrative

 Desired status of the interface: Up/Down; default: Up


 Framing Type


  
 ESF—T1 framing for extended superframes (ESF) (default)
  
 SF—T1 framing for superframes (SF)
  
 CRC4—Cyclic redundancy check (CE1 only)
  
 no CRC4—(CE1 only)



 Transmit Clock


  
 Received Timing—Sets the clock source on the active line
  
 Module Timing—Receives its clocking from a network source
  
 Chassis Timing—Receives its clocking from the configured system clock



 Operation Mode

 Specifies the type of controller (DS1):

  
 T1—T1 and CT3 modules only
  
 E1—E1 module only (Europe)
  
 J1—T1 module only; J1 variant of the T1 framing (Japan)



 Line Coding


  
 AMI—Specifies alternate mark inversion; default
  
 B8ZS—Specifies bipolar with eight-zero substitution; T1 and CT3 modules only
  
 HDB3—Specifies high-density bipolar 3 line-code type; E1 module only (Europe) 



 Loopback Mode


  
 None—No loopback specified; default
  
 Network Payload—Loops the data toward the network
  
 Network Line—Sets a local loopback at the payload controllers
  
 Local—Loops back outgoing data from the transmit to the receive side



 DS0 Bundle Time Slots


  
 Time slots 1-24 (CT3 and CT1) or 1-31 (CE1) 
  
 An X indicates preallocated DS0 bundle timeslots on the T1 line interface selected



 Allocated Bandwidth (kbps)


  
 Displays the total amount of allocated bandwidth




 

4. Click Save.

You can now create DS0 interfaces on the DS1 interface. See Chapter 13, Configuring DS0 Bundles.