RAD Data comm ASMi-52 manual Enabling CRC-4 Code Generation, Setting the Sync Mode

Chapter 4 Configuration Installation and Operation Manual

Note

ASMi-52

Framed mode (Unframed)

1.Unframed

2.G732N

3.G732S transparent

>

ESC-prev. menu; !-main menu; &-exit; @-scroll

Figure 4-34. Framed Mode Menu

Enabling CRC-4 Code Generation

You have to enable the CRC-4 code generation if you intend to gather statistics on the E1 performance. CRC-4 code generation is available for ASMi-52 units configured to G732N framing mode.

• CRC-4 code generation is configurable if one of the conditions below is fulfilled. If the local ASMi-52 is configured as a CO,

if the local ASMi-52 is configured as CPE and the remote is not an E1 modem.

• The remote ASMi-52 is configurable if the local is configured as CO and is not an E1 modem.

To enable CRC-4 code generation:

1.From the E1 Local Port menu, select CRC-4 (Main menu > Configuration > E1 Configuration > E1 Local Port > CRC-4).

The CRC-4 value changes.

2.Save the changes.

Setting the Sync Mode

You can define the time required for the E1 port operating in framed mode to resume normal operation after loss of synchronization:

•CCITT – As per requirements of ITU-T Rec.G.732

•Fast – After 1 sec

•62411 – As per requirements of AT&T TR-62411 (after 10 sec).

To select resynchronization time:

1.From the E1 Local Port/T1 Local Port menu, select Sync Mode (Main menu > Configuration > E1 Configuration/T1 Configuration > E1 Local Port > Sync Mode).

The Sync Mode menu appears (see Figure 4-35).

2.From the Sync Mode menu, select CCITT, FAST, or 62411.

The E1 Local Port menu appears. 3. Save the changes.

4-30 Configuring the Physical Ports ASMi-52 Ver. 2.5