• Cisco 1-Port T1/Fractional T1 DSU/CSU WAN Interface Card (HWIC-1DSU-T1)
• Cisco 1-Port Serial WAN Interface Card (HWIC-1T)
• Cisco 2-Port Serial WAN Interface Card (HWIC-2T)
• Cisco 2-Port Asynchronous/Synchronous Serial WAN Interface Card (HWIC-2A/S)
Common Applications
These highly flexible interface cards facilitate several important applications:• WAN access and aggregation
• Legacy protocol transport
• Dial access server
WAN Access and Aggregation
Serial interfaces can be used to provide WAN access for remote sites. With support for serial speeds up to 8 Mbps per port, the 2-port serial HWIC is ideal for low- and medium-density WAN aggregation (Figure 2). The HWIC-1DSU-T1 also offers an integrated CSU/DSU, simplifying configuration and management. Integration allows management of the router and CSU/DSU as a single SNMP entity while also providing detailed troubleshooting capabilities. Troubleshooting features include self-test, loopbacks, CSU/DSU reset, alarm counters, and T1 statistics.
Legacy Protocol Transport
Serial and synchronous/asynchronous ports are ideally suited to transport legacy traffic across a TCP/IP network, facilitating network convergence (Figure 3) and eliminating costly separate leased lines for this traffic. Legacy protocols supported by Cisco IOS ® Software include:• Systems Network Architecture (SNA) and Synchronous Data Link Control (SDLC) Protocol
• Binary Synchronous Communications Protocol (Bisync)
• X.25 Protocol
Dial Access Server
Asynchronous HWICs can connect to external dial modems to provide low-density dial access servers (Figure 4).
Ordering Information
Table 1. Cisco 1- and 2-Port Serial and Asynchronous HWICs
Part Number | Description |
HWIC-1DSU-T1 | 1-Port T1/Fractional T1 DSU/CSU WAN Interface Card |
HWIC-1T | 1-Port Serial WAN Interface Card |
HWIC-2T | 2-Port Serial WAN Interface Card |
HWIC-2A/S | 2-Port Async/Sync Serial WAN Interface Card |
IOS Release, Feature Sets, Licenses and Platform Support
Table 2. Minimum IOS Releases, Feature Sets and Licenses
Platforms | Minimum Cisco IOS Sotware Release | Minimum Cisco IOS Sotware Feature Set or License |
Cisco 1800, 2800, and 3800 Series Integrated Services Routers | • 12.4(20T • 12.4(23) • 12.4(15)T | IP Base |
Cisco 1900, 2900, and 3900 Series Integrated Services Routers | • 15.0(1)M | IP Base |
Table 3. Supported Platforms and Quantities
Platforms | HWIC-1T | HWIC-1DSU-T1 | HWIC-2T | HWIC-2A/S |
Cisco 1841 | 2 | 2 | 2 | 2 |
Cisco 1861 | No | No | No | No |
Cisco 1941 | 2 | 2 | 2 | 2 |
Cisco 2801 | 2 | 2 | 2 | 2 |
Cisco 2811, 2821, 2851 | 4 | 4 | 4 | 4 |
Cisco 2901, 2911, 2921, 2951 | 4 | 4 | 4 | 4 |
Cisco 3825 and 3845 | 4 | 4 | 4 | 4 |
Cisco 3925 and 3945 | 4 | 4 | 4 | 4 |
Connectors and Cabling
Smart Serial Cabling
The HWIC-1T, HWIC-2T, and HWIC-2A/S use Cisco Smart Serial connectors. The supported cables are noted in Table 3. The HWIC-1DSU-T1 uses a RJ-45 connector.Table 4. Smart Serial Cabling for HWIC-1T, HWIC-2T, and HWIC-2A/S
Product Number | Cable Type | Length | Connector Type |
CAB-SS-V35MT | V.35 DTE | 10 ft (3m) | Male |
CAB-SS-V35FC | V.35 DCE | 10 ft (3m) | Female |
CAB-SS-232MT | EIA/TIA-232 DTE | 10 ft (3m) | Male |
CAB-SS-232FC | EIA/TIA-232 DCE | 10 ft (3m) | Female |
CAB-SS-449MT | EIA/TIA-449 DTE | 10 ft (3m) | Male |
CAB-SS-449FC | EIA/TIA-449 DCE | 10 ft (3m) | Female |
CAB-SS-X21MT | X.21 DTE | 10 ft (3m) | Male |
CAB-SS-X21FC | X.21 DCE | 10 ft (3m) | Female |
CAB-SS-530MT | EIA/TIA-530 DTE | 10 ft (3m) | Male |
CAB-SS-530AMT | EIA/TIA-530A DTE | 10 ft (3m) | Male |
Specifications
The specifications of the HWICs are listed in Tables 4, 5, and 6.Table 5. HWIC Signaling and Telecom Specifications
Specification | HWIC-1DSU-T1 | HWIC-1T | HWIC-2T | HWIC-2A/S |
Synchronous Support | Yes | Yes | Yes | Yes |
Synchronous Maximum Speed (Per Port) | 1.544 Mbps | 8 Mbps | 8 Mbps | 128 kbps |
Asynchronous Support | No | Yes | Yes | Yes |
Asynchronous Maximum Speed (Per Port) | - | 115.2 kbps | 115.2 kbps | 115.2 kbps |
Bisync Support | No | Yes | Yes | Yes |
Serial Protocols | - | EIA-232, EIA-449, EIA-530, EIA-530A, V.35, and X.21 | EIA-232, EIA-449, EIA-530, EIA-530A, V.35, and X.21 | EIA-232, EIA-449, EIA-530, EIA-530A, V.35, and X.21 |
Network Clock Synchronization | Yes | Yes | Yes | Yes |
NEBS | Type 1/3 | Type 2/4 | Type 2/4 | Type 2/4 |
TelecommPTT | • TIA-968-A • Industry Canada CS-03 Part II • JATE Digital • ID0002 • HK2017 • NEBS | • TBR1 and 2 • JATE Digital • NEBS | • TBR1 and 2 • JATE Digital • NEBS | • TBR1 and 2 • JATE Digital • NEBS |
Table 6. Specifications unique to Cisco 1-Port T1/Fractional T1 DSU/CSU WAN Interface Card (HWIC-1DSU-T1)
Specification | Data |
Network Interface Specifications | • Transmit bit rate: 1.544 Mbps +/- 50 bps • Receive bit rate: 1.544 Mbps +/- 100 bps • Line code: AMI, B8ZS • AMI ones density • Forced/bit robbing (N X56) • High-Level Data Link Control (HDLC) data inversion (N X64) • Framing format: D4 (SF) and DSF • Output level (LBO) 0, -7.5, or -15 dB, DSU 0-655 feet • Input level: +1 dB0 to -24 dB0 |
Recognized BERT Test Patterns | 1:2, 1:5, 1:8, 3:24, QRW, all 0s, all 1s, and user-programmable 24-bit patterns |
Table 7. Homologation Specifications for the HWIC-1DSU-T1, HWIC-T1, HWIC-2T, and HWIC-2A/S
Specification | Data |
Safety Approvals | • UL 60950 (United States) • CAN/CSA 22.2, CSA60950 (Canada) • GB 4943 (China) • AS/NZS 60950 (Australia/New Zealand) • EN60950 (Europe) • IEC 60950 (International) |
Immunity | • EN300386 • CISPR24 • EN55024 • EN50082-1 • 61000-4-2/3/4/5/6/8/11 |
Emissions | • FCC Part 15 Class A • ICES-003 Class A • EN55022 Class A • CISPR22 Class A • AS/NZSCISPR22 Class A • VCCI Class A • EN 300386 • EN61000-3-2/3 • CNS13438 |
Physical Specifications | • Singlewide HWIC, no slot restrictions • Dimensions (H x W x D) 0.8 x 3.1 x 5.6 in. (2.1 x 7.9 x 14.2 cm) |
Environmental Specifications | • Operating temperature: 32 to 104°F (0 to 40°C) • NEBS short-term operating temperature: 32 to 131°F (0 to 50°C) • Storage temperature: -4 to 149°F (-20 to 65°C) • Relative humidity: 10 to 90%, noncondensing |