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Operation
3.9.2 IBS/D&I Configuration (Older Modems)
1.
In this configuration, J17 on the back panel will be used as the ES-ES Communications
Port.
2.
Attach the 10 Pin Ribbon Cable from J17 on the Back Panel to J11 on the AS/3771
Daughter Card.
3.
Install Jumpers R38 and R40 located on the AS/3771 Daughter Card.
4.
Cycle power on the unit.
3.10 Configuring the DMD2401 for Drop and Insert
Several dependencies exist when configuring the modem for Drop and Insert (D&I). The
following paragraphs explain these dependencies and provide the user with the information
required to ensure smooth transition into Drop & Insert and to minimize the potential impact of
these dependencies.
The following steps should be followed when setting up Drop & Insert:
1.
Select the appropriate interface type:
Newer Modem:
B.T1.AMI
B.T1.B8ZS
U.E1
B.E1
Older Modem:
B.T1.B8ZS
U.E1
B.E1
2.
Set the mode to Closed Net
3.
Select the desired Data Rate.
4.
Set the Mode to Drop & Insert.
5.
Select the Terrestrial Framing.
6.
Select the Terrestrial Frame Source (applicable to Insert only).
7.
Use the SatCh TS edit capability to define the desired mapping of Satellite Channels to
Terrestrial Slots.
8.
Copy the appropriate Edit Map to the Active Map.
3-8
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
Balanced T1 (1.544 Mb) AMI Coding
Balanced, T1 (1.544 Mb), B8ZS Coding,
Unbalanced, E1 (2.048 Mb), HDB3 Coding
Balanced, E1 (2.048 Mb), HDB3 Coding
Balanced, T1 (1.544 Mb), B8ZS Coding,
Unbalanced, E1 (2.048 Mb), HDB3 Coding
Balanced, E1 (2.048 Mb), HDB3 Coding
TM075 – Rev. 1.3
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