3Com MSR 50, MSR 30, MSR 20 manual Following table describes the LEDs on the FIC-1AE3 panel

FIC-1AE3 185

■For an ISDN U interface line, adapt the interface with an NT1 by inserting one end of the S/T interface cable into the S/T port on the NT1 and the other end to the BRI port on the FIC-4BSE.

■For an ISDN S/T interface line, directly connect the cable to the BRI port on the FIC-4BSE.

FIC-1AE3

Introduction FIC-1AE3, the 1-port 34 Mbps ATM-E3 interface card, provides these functions:

■Two ATM cell mapping modes: ATM direct mapping (ADM) and physical layer convergence protocol (PLCP).

■Scrambling in data transmission.

■Line clock (when working as DTE interface) and internal clock (when working as DCE interface).

■Four types of test measures: local cell loopback, local loopback, remote payload loopback, and remote line loopback.

n You may equip your router with FIC-1AE3 cards to its full capacity. Yet, you are recommended to install only one FIC-1AE3 on it, whatever its model is, to ensure performance of some key services.

Interface Attributes The following table describes the interface attributes of the FIC-1AE3.

Table 129 Interface attributes of the FIC-1AE3

Attribute	FIC-1AE3
Connector	SMB
Number of connectors	2
Interface standard	G.703, G.751, G.832, G.823
Interface rate	34.368 Mbps
Interface cable	E3/T3 cable (75-ohm coaxial cables)
Supported services	ATM traffic CBR (constant bit rate), rt_VBR
	(variable bit rate-real time), nrt_VBR
	(variable bit rate-non real time), UBR
	(unspecified bit rate)

Interface LEDs The following figure illustrates the FIC-1AE3 panel:

Figure 227 FIC-1AE3 panel

The following table describes the LEDs on the FIC-1AE3 panel.