78-5296-02 10/02/98 Hardware Description 1
Cisco 6200 User Guide 1-13
1.3.3 NTC OC-3 Specifications
Table 1-4 lists the physical and electrical specifications of the NTC.
Table 1-4 NTC OC-3 Specifications
1.3.4 What is the NTC STM-1?
The NTC STM-1 is a service interface module that concentrates the data traffic from all Cisco 6200
subscriber ports and connects the node to a single trunk line from the service-providing ATM
network. This full-duplex channel unit carries data both downstream (to the subscriber) and
upstream (from the subscriber).
The trunk is a full-duplex STM-1 fiber optic channel. One STM-1 channel terminates at a single
NTC.
The NTC STM-1 is available in both single-mode and multimode versions. Multimode fiber is
LED-driven and is designed for distances up to 2 kilometers (1.2 miles). Longer distances (up to
15 kilometers or 9.2 miles) require laser-driven single-mode fiber.
In the downstream direction, the NTC STM-1 accepts ATM cells at the SDH rate (155.52 Mbps) and
adapts these cells to the Cisco 6200 internal bus.
Specification Description
External interface One SONET STS-3c (155 Mbps).
Single-mode (intermediate reach) and
multimode OC-3c versions available
Connector type SC
Fiber types • Single mode (up to 15 km)
• Multimode (up to 2 km)
Average transmitted power • Single mode: –11.5 dBm
• Multimode: –17 dBm
Average received power • Single mode: –28 to –8 dBm
• Multimode: –30 to –14 dBm
Transmission distances • Single mode: up to 15 km (9.2 miles)
• Multimode: up to 2 km (1.2 miles)
Wavelength (both modes) 1310 nm
Level 2 protocol ATM
Timing Loop timed
Internal interface 16-bit parallel bus at 10 Mbps (160 Mbps
total throughput)
Internal hardware • Motorola MC68360
• 0.5M of PROM
• 4M of RAM
• Odetics SONET interface
Dimensions
(width x height x depth)
1.5 x 15.75 x 9.75 in
(3.8 x 40.0 x 24.8 cm)
Weight 2 lb (0.9 kg)
Power consumption 26W
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