Nortel Networks CVX 600 Manuel D’Utilisation
SCC-LTM/-RLTM Interfaces
A-18
296-1011-202 Rel. 5.0, Doc. Rev. 02.01
CVX 600 Hardware Installation Guide
SCC-LTM/-RLTM Interfaces
The following table lists the interfaces on the SCC-LTM and SCC-RLTM:
Interface
Description
Console
•
One DB-9 RS-232 serial port
HSSI
(SCC-HSSI-RLTM)
(SCC-HSSI-RLTM)
•
One port
•
50-pin connector
•
Status LED on the SCC-SM for the SCC-HSSI-RLTM
10/100BASE-TX
•
Switched IEEE 802.3 with autosensing capabilities
•
RJ-45 connectors
•
MIPS R5000, 64 bit, 180 MHz
•
MDI-X
•
Full-duplex operation
•
Status LEDs on the SCC-SM
Alarms
•
Up to six independent alarm signals: three audible, three
visual
visual
•
Gold-clad silver-alloy contacts
Note: The contacts on the terminal block are rated at 30 VAC
and have a maximum current rating of 1 A. The circuit
connecting the alarms must meet the safety extra-low voltage
(SELV) requirements. The wires connecting the alarms must
be the appropriate gauge for alarm devices.
and have a maximum current rating of 1 A. The circuit
connecting the alarms must meet the safety extra-low voltage
(SELV) requirements. The wires connecting the alarms must
be the appropriate gauge for alarm devices.
Clock
The following applies to all DAC LTMs with an external clock
port:
port:
•
The external clock cicuitry contains a standard T1/
E1 LIU device with receive TIP/RING terminated at
120 ohms (incoming twisted pair).
E1 LIU device with receive TIP/RING terminated at
120 ohms (incoming twisted pair).
•
T1 clock rate = 1.544 MHz
•
E1 clock rate = 2.048 MHz
•
Port is hardwired for Bipolar Mode only.
•
Port uses B8ZS/HDB3 encoding/decoding.
The external clock port m
eets or exceeds specifications in
ANSI T1.403 and T1.408; ITU I.431, G.703, G.736,
G.775 and G.823; ETSI 300-166 and 300-233; and
AT&T Pub 62411.
G.775 and G.823; ETSI 300-166 and 300-233; and
AT&T Pub 62411.