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در این دسته می توان به روتر 1721 اشاره کرد که در تولیدات جدید، بین 64 تا 96 مگابایت DRAM را دارا می باشد، وجود یک شیار جهت اتصال کارت Wic از ویژگی های آن است. این دستگاه قابلیت پشتیبانی از ماژولهای NM را ندارد و صرفا جهت مسیریابی استفاده می گردد .
Fast and Flexible Data Access
The Cisco 1721 is a modular router optimized for data-access applications, providing businesses with the most complete functionality and flexibility to deliver secure Internet and Intranet access. The router offers a wide array of WAN access options, high-performance routing, Quality of Service, inter-virtual LAN routing, and VPN access with firewall options. Powered by Cisco IOS, the Cisco 1721 offers high reliability and flexibility of interchangeable WAN interface cards, comprehensive security that includes hardware-assisted VPN encryption and a stateful inspection firewall, and business-class DSL with enhanced quality of service to ensure high-performance levels are guaranteed.
Key Benefits:
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Cost-effective modular device optimized for data-access applications
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Offers a wide array of WAN access options, high-performance routing, VLAN routing, and VPN access with firewall options
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Offers business-class DSL through ADSL and G.SHDSL technologies with enhanced QoS
Physical Interfaces/Ports
- One 10/100BASE-TX Fast Ethernet port (RJ-45)
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- Automatic speed detection
- Automatic duplex negotiation
- IEEE 802.1Q VLAN routing
- Two WAN interface card slots
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- Supports any combination of two WAN interface cards as shown in Table 3
- One auxiliary (AUX) port
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- RJ-45 jack with EIA/TIA-232 interface
- Asynchronous serial data terminal equipment (DTE) with full modem controls Carrier Detect, data set ready (DSR), Request To Send (RTS), Clear To Send (CTS)
- Asynchronous serial data rates up to 115.2 kbps
- One console port
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- RJ-45 jack with EIA/TIA-232 interface
- Asynchronous serial DTE
- Transmit/receive rates up to 115.2 kbps (default 9600 bps, not a network data port)
- No hardware handshaking such as RTS/CTS
- One internal expansion slot for support of hardware-assisted services such as VPN encryption
(up to T1/E1 performance)
WAN Interface Specifications (Optional)
- Synchronous serial interfaces on serial WAN interface cards
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- Interface speed: up to 2.0 Mbps (T1/E1)
- Synchronous serial protocols: Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC),
Link Access Procedure, Balanced (LAPB), IBM Systems Network Architecture (SNA)
- Synchronous serial WAN services: Frame Relay, X.25, SMDS
- Synchronous serial interfaces supported on the WIC-1T, WIC-2T, and WIC-2A/S cards: V.35, EIA/TIA-232, EIA/TIA-449, X.21, EIA-530
- Asynchronous serial interfaces on serial WAN interface cards
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- Interface speed: up to 115.2 kbps
- Asynchronous serial protocols: PPP, Serial Line Internet Protocol (SLIP)
- Asynchronous interface: EIA/TIA-232
- ADSL WAN interface card
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- Supports ATM adaptation layer 5 (AAL5) services and applications
- Interoperates with Alcatel DSL access multiplexer (DSLAM) with Alcatel chipset and Cisco 6130/6260 DSLAM with Globespan chipset
- Complies with ANSI T1.413 issue 2 and ITU 992.1 (G.DMT)
- G.shdsl WAN interface card
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- Based on the ITU G.991.2, delivers symmetrical data rates from 192 kbps to 2.3 Mbps; speeds vary, depending on loop length and line conditions
- ISDN WAN interface cards
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- ISDN dialup and ISDN DSL (IDSL) at 64 and 128 kbps
- Encapsulation over IDSL, Frame Relay, and PPP
Dimensions and Weight
- Width: 11.2 in.(28.4 cm)
- Height: 3.1 in. (7.85 cm)
- Depth: 8.7 in. (22.1 cm)
- Weight (maximum): 2.9 lb (1.32 kg)
Power
- Locking connector on power socket
- AC input voltage: 100 to 240 VAC
- Frequency: 47 to 64 Hz
- AC input current: 0.5 amps
- Power dissipation: 20W (maximum)
Environmental
- Operating temperature: 32° to 104° F (0° to 40° C)
- Nonoperating temperature: -4° to 149° F (-20° to 65° C)
- Relative humidity: 10 to 85% noncondensing operating; 5 to 95% noncondensing, nonoperating
Safety
- UL 1950
- CSA 22.2—No. 950
- EN60950
- EN41003
- AUSTEL TS001
- AS/NZS 3260
- ETSI 300-047
- BS 6301 (power supply)
EMI
- AS/NRZ 3548 Class A
- Class B
- FCC Part 15 Class B
- EN60555-2 Class B
- EN55022 Class B
- VCCI Class II
- CISPR-22 Class B
Immunity
- 55082-1 Generic Immunity Specification Part 1: Residential and Light Industry
- IEC 1000-4-2 (EN61000-4-2)
- IEC 1000-4-3 (ENV50140)
- IEC 1000-4-4 (EN61000-4-4)
- IEC 1000-4-5 (EN61000-4-5)
- IEC 1000-4-6 (ENV50141)
- IEC 1000-4-11
- IEC 1000-3-2
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