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T1/E1 Out [1204-09, -0A]

The E1/T1 option card provide 1.544 MHz or 2.048 MHz and E1 or T1 data outputs for the SecureSync platform. SecureSync meets G.812 Type I when installed with a Rubidium option, and G.811 when installed with a Rubidium option and synchronized with GNSS.

Note: Rubidium oscillators are recommended for the E1/T1 option card.

Model 1204-09 E1/T1 (75 Ω): Specifications

  • Outputs:
    • (1) 1.544/2.048 MHz Output
    • (2) Unbalanced E1/T1 Outputs
  • T1 mode:
    • 1.544 MHz (square wave) frequency output
    • (2) 1.544 Mb/sec data rate outputs:
      • Outputs are DS1 framed all ones
      • Supports Super Frame (SF or D4) and Extended Super Frame (ESF)
      • SSM support
  • E1 mode:
    • 2.048 MHz (square wave) frequency output
    • (2) 2.048 Mb/sec data rate outputs:
      • Outputs are E1 frame all ones
      • Supports CRC4 and CAS Multiframe
      • SSM support
  • Connector and Signal Type: BNC
    • 1.544/2.048 MHz TTL into 50 Ω
    • T1 according to GR-499-CORE (75 Ω)
    • E1 according to ITU-T G703 (75 Ω)
  • Maximum Number of Cards: 6
  • Ordering Information: 1204-09: T1/E1 (75 Ω) module

Model 1204-09 option card rear plate

Model 1204-0A E1/T1 (100/120 Ω): Specifications

  • Outputs:
    • (1) 1.544/2.048 MHz RS-485 Outputs
    • (2) Balanced E1/T1Outputs
  • T1 mode:
    • 1.544 MHz (square wave) frequency output
    • (2) 1.544 Mb/sec data rate outputs:
      • Outputs are DS1 framed all ones
      • Supports Super Frame (SF or D4) and Extended Super Frame (ESF)
      • SSM support
  • E1 mode:
    • 2.048 MHz (square wave) frequency output
    • (2) 2.048 Mb/sec data rate outputs:
      • Outputs are E1 frame all ones
      • Supports CRC4 and CAS Multiframe
      • SSM support
  • Connector and Signal Type: Terminal block
    • 1.544/2.048 MHz RS-485
    • T1 according to GR-499-CORE (100 Ω)
    • E1 according to ITU-T G703 (120 Ω)
  • Maximum Number of Cards: 6
  • Ordering Information: 1204-0A: T1/E1 (100/120 Ω) module

Model 1204-0A option card rear plate

1204-0A option card pin assignments

Pin Assignments
Pin No. Signal Function Description
1 GND Ground Ground
2 1.544MHz/2.048MHz RS-485 A Terminal Square wave
3 1.544MHz/2.048MHz RS-485 B Terminal Square wave
4 GND Ground Ground
5 T1/E1 output A1 GR-499/G.703 Tip
6 T1/E1 output B1 GR-499/G.703 Ring
7 GND Ground Ground
8 T1/E1 output A2 GR-499/G.703 Tip
9 T1/E1 output B2 GR-499/G.703 Ring
10 GND Ground Ground

E1/T1 Output: Edit Window

To configure an E1/T1 data output (1.544/2.048 MHz clock on J1 BNC connector and unbalanced E1/T1 outputs on J2 to J3 BNC connectors, or all terminal block J1 outputs), navigate to its Edit window. For instructions, see: Configuring Option Card Inputs/Outputs.

In the Web UI this card is listed under: E1/T1 Out BNC and E1/T1 OUT Terminal.

Note: SecureSync starts numbering I/O ports with 0 (only 1PPS and 10 MHz outputs start at 1, because of the built-in outputs).

The Edit window allows the configuration of the following settings:

  • Signature Control: Controls when the output will be present. For more information, see Signature Control.
  • Mode: This option selects T1, E1, or disabled mode. For T1 mode, the clock output will be 1.544 MHz, and for E1 the clock output will be 2.048 MHz.
  • SSM Enabled: Enables or disables Sync Status Messaging (SSM). T1 SSM is not valid with D4/Superframe or AIS framing. E1 SSM is not valid with AIS framing.
  • E1 Encode: HDB3 only.
  • E1 Framing: This option selects the framing standard (CRC-4, No CRC-4, or AIS).
  • T1 Framing: This option selects the framing standard (D4/Superframe, Extended Superframe [CRC-6/no CR C-6], or AIS).
  • T1 Encoding: This option selects the encoding method (B8ZS or AMI).
  • T1SSM Value: This option selects the SSM quality level transmitted when SSM is enabled.
  • E1 SSM Value: This option selects the SSM quality level transmitted when SSM is enabled.

E1/T1 Output: Status Window

To view the configuration settings of the E1 OUT or T1 OUT output, go to its Status window. For instructions, see: Viewing Input/Output Configuration Settings.

The Web UI list entries for these cards are: E1/T1 Out BNC and E1/T1 OUT Terminal.

Note: SecureSync starts numbering I/O ports with 0 (only 1PPS and 10 MHz outputs start at 1, because of the built-in outputs).

The E1/T1 Output 0 Status Screen will vary according to whether the output signal mode is E1 or T1.

The Status windows display the following settings:

  • Signature Control: Controls when the output will be present; see Signature Control.
  • Mode: This option selects T1, E1, or disabled mode. For T1 mode, the clock output will be 1.544 MHz, and for E1 the clock output will be 2.048 MHz.
  • SSM Enabled: Enables or disables Sync Status Messaging (SSM). T1 SSM is not valid with D4/Superframe or AIS framing. E1 SSM is not valid with AIS framing.
  • E1 Encoding: HDB3 only.
  • E1 Framing: This option selects the framing standard (CRC-4, No CRC-4, or AIS).
  • T1 Framing: This option selects the framing standard (D4/Superframe, Extended Superframe [CRC-6/no CR C-6], or AIS).
  • T1 Encoding: This option selects the encoding method (B8ZS or AMI).
  • T1 SSM Value: This option selects the SSM quality level transmitted when SSM is enabled.
  • E1 SSM Value: This option selects the SSM quality level transmitted when SSM is enabled.