Serial and asynchronous high-speed WAN interface cards (HWICs) provide highly flexible connections for Cisco  1800, 1900, 2800, 2900, 3800, and 3900 Series Integrated Services Routers. These HWICs help customers enable applications such as WAN access, legacy protocol transport, console server, and dial access server. You can mix and match HWICs to tailor cost-effective solutions for common networking problems such as remote network management, external dial-modem access, low-density WAN aggregation, legacy protocol transport, and high-port-density support.

Cisco offers four new serial and asynchronous HWICs:

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)

Figure 1. Cisco 1- and 2-Port Serial and Asynchronous HWICs

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.

Figure 2. WAN Concentration

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

Figure 3. Network Convergence

Dial Access Server

Asynchronous HWICs can connect to external dial modems to provide low-density dial access servers (Figure 4).

Figure 4. Dial Access Server

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 1921

2

2

2

2

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-48 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 TestPatterns

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 104F (0 to 40C)
NEBS short-term operating temperature: 32 to 131F (0 to 50C)
Storage temperature: -4 to 149F (-20 to 65C)
Relative humidity: 10 to 90%, noncondensing

 

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