Cisco Systems 1 lists the specifications of the Cisco 4000 series routers, Interface Options

Series Specifications

For complete configuration information, refer to the Cisco Product Catalog, which is available on the Web at http://www.cisco.com.

Table 1-1 lists the network processor module interface options available for the Cisco 4000 series when this guide was printed. For current modules, see the configuration note packet that shipped with your router.

Interface Options	Port Options	Part Numbers
Ethernet	Single port, dual port, or six port	NP-1E=, NP-2E=, NP-6E=
Fast Ethernet	Single port	NP-1FE=
Synchronous serial	Dual port or four port	NP-2T=, NP-4T=
Synchronous/asynchronous	Dual high-speed ports and	NP-2T16S=
serial1	16 low-speed ports
HSSI	Single HSSI port	NP-1HSSI=
Token Ring	Dual port or single port	NP-1RV2=, NP-2R=
Multimode FDDI	Single attachment or dual attachment	NP-1F-D-MM=,
		NP-1F-S-M=
Single-mode FDDI	Dual attachment	NP-1F-D-SS=
BRI	Four port or eight port	NP-4B=, NP-8B=
G.703	Four port (balanced or unbalanced)2	NP-4GB=, NP-4GU=
Channelized T1/ISDN PRI	Single channelized T1/PRI port	NP-CT1=
Channelized E1/ISDN PRI	Single channelized E1/PRI port	NP-CE1=
ATM	Single ATM port	NP-1A-SM=,NP-1A-MM=
		, NP-1A-DS3=,
		NP-1A-E3=

1.Each low-speed port can be individually configured for synchronous or asynchronous.

2.For G.703 and G.704 connections, balanced or unbalanced ports must be matched with the corresponding balanced or unbalanced cable.

Table 1-1lists the specifications of the Cisco 4000 series routers.

Overview of the Cisco 4000 Series Routers 1-5