3Com V3000 ANALOG, Руководство по установке

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42 C
HAPTER
1: I
NTRODUCTION
3C10165D includes an onboard CSU. The 3C10165D can provide CSU
performance statistics, can be enabled for loopback testing, and can be
configured as a remote device that communicates with its NCP over a
routed network.
CAUTION: 3C10165D E1 Digital Line Cards and 3C10116D T1 Digital
Line Cards can have their flash memory corrupted if you remove power
from the cards or remove the cards from the NBX chassis while they are
receiving their download after a system upgrade.
ISDN PRI services require specific circuit provisioning, which you must
obtain before using this card. See
Appendix B for more information.
Figure 10 E1 Digital Line Card (3C10165C) (superseded by 3C10165D)
Figure 11 E1 Digital Line Card (3C10165D)
Each
3C10165C
E1 card has the following lights and connectors:
■
E1 — This RJ-48C connector makes a connection to an ISDN interface
channel service unit/data service unit (CSU/DSU).
■
Status Lights — These lights indicate the status of the card’s
signaling, synchronization, and loop back test.
■
CF — On indicates a Carrier Failure. The card is not receiving carrier
signals from the far end of the E1 line.
■
RA — On indicates a Remote Alarm. The far end of the E1 line is
not receiving appropriate signaling from the E1 board.
■
LB — On indicates that loop-back testing is going on.
■
Nominal — On indicates ready to send and receive information.
■
10BASE-T Uplink MDI — This RJ-45 Ethernet connector connects the
card to an external LAN hub or switch. If the E1 Digital Line Card is