Connect the ATM SMI3 and MM3 Ports

Connect the Router to the Network (continued)

5
I		RX	155	- MM	TX
EN	RX	RX			TX
	CEL CAR ALM				22129

	To ATM network
	To ATM network	ATM 1/0
	equipment	ATM 1/0
	equipment

The SMI3 (OC-3c/STM-1 single-mode intermediate reach) and MM3 (OC-3c/STM-1 multimode) ports provide an interface to ATM networks and transmit and receive data at rates of up to 155 Mbps bidirectionally. The SMI3 and MM3 ports connect to a SONET/SDH single-mode or multimode optical ﬁber cable. Use one duplex SC-type connector or two simplex SC-type connectors.

Warning Class 1 laser product.

Warning Because invisible laser radiation may be emitted from the aperature of the port when no ﬁber cable is connected, avoid exposure to laser radiation and do not stare into open apertures.

1	Attach the ﬁber-optic cable (either one
	duplex SC-type connector or two
	simplex SC-type connectors) directly to
	the receptacle on the router.
2	Attach the network end of the cable to
	an external DSU (an ATM network).

Note: For information on SONET speciﬁcations for ﬁber-optic transmissions, power budget, and power margins for multimode and single-mode transmissions, refer to Appendix C, “Cable Speciﬁcations,” in the Cisco 7100 Series VPN Router Installation and Conﬁguration Guide.