RAD Data comm ASMi-52 Configuring the E1 Interface, To access the E1 Port Configuration menu

Chapter 4 Configuration Installation and Operation Manual

Configuring the E1 Interface

The following are commonly used acronyms:

•CO – Central Office, where the clock source is set to internal or external

•CPE – customer premise equipment.

When ASMi-52 includes a G.704 E1 port, you can configure the following parameters:

•Framed mode

Unframed – Stream of bits at 2.048 Mbps G732N – Timeslot 0 contains sync word

G732S transparent – 16 frames per multi-frame, timeslot 16 is passed transparently.

Note • If the opposite modem is E1, then the Framed Mode value can be is G732N, G732S Transparent, or Unframed.

•If the opposite modem is Serial DTE or LAN, then the Framed Mode value can be G732N, or Unframed

•If Frame Mode is Unframed, then all the rest of the parameters are disabled.

•Sync mode: define the time required for the E1 port to return to normal operation after sync loss:

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).

•CRC-4: Enabling generation and checking of check bits for the frames transmitted on the E1 port (as per CRC-4 polynomial specified by ITU G.704). Check bits generation is available only for the G732N framing mode.

•Idle Code: Selecting a code transmitted to fill unused timeslots in the E1 frames.

•Time Slot Assignment – Assigning each timeslot to carry user’s data

•Unit Identical Set

Yes – copies Sync Mode, Time Slot Assignment and Idle Code definitions to the remote modem

No – Sync Mode, Time Slot Assignment and Idle Code must be defined in both modems individually

•First time slot for remote E1 – define the first time slot for the remote E1 unit. The E1 port configuration is performed via the E1 Configuration menu.

To access the E1 Port Configuration menu:

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

The E1 Local Port/E1 Remote Port menu appears (see Figure 4-32and

Figure 4-33).

4-28 Configuring the Physical Ports ASMi-52 Ver. 2.5