Nortel Networks CVX 600 manual SCC-LTM/-RLTM Interfaces, Interface Description

CVX 600 Hardware Installation Guide

SCC-LTM/-RLTM Interfaces

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	•	One port
(SCC-HSSI-RLTM)	•	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
	• 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.
Clock	The following applies to all DAC LTMs with an external clock
	port:
	• The external clock cicuitry contains a standard T1/
		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 meets 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.

A-18 296-1011-202 Rel. 5.0, Doc. Rev. 02.01