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by Cisco
Product Line: Cisco SM-32A Service Module
Product Type: Service module
Original price $0.00 - Original price $228.00
Original price
$0.00 - $228.00
Current price $228.00
Title: Used

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Product Description

The SM-32A Cisco module features 32 Asynchronous EIA-232 Ports with a high-density 8-port connector, designed for compatibility with Cisco 2900 Series and Cisco 3900 Series platforms. It supports asynchronous communication up to 230.4 kbps per port, without network clock synchronization, and includes bisync support and lead manipulation. The module adheres to multiple immunity and emissions standards, including EN300386 and FCC Part 15 Class A, and operates within a temperature range of 0 °C to 40 °C, with a form factor of 1.58 in. height, 7.44 in. width, and 7.5 in. depth.

Key Feature for the SM-32A

  • Q: How many asynchronous EIA-232 ports does the device have?
    A: The device has 32 asynchronous EIA-232 ports.
  • Q: What type of connectors are used with this hardware?
    A: It uses high-density 8-port connectors.
  • Q: Is the device compatible with Cisco 2900 and 3900 Series?
    A: Yes, it supports both Cisco 2900 Series and Cisco 3900 Series platforms.
  • Q: Can the device support synchronous connections?
    A: No, the device does not support synchronous connections.
  • Q: What is the maximum asynchronous speed per port?
    A: The maximum asynchronous speed per port is 230.4 kbps.
  • Q: Does the device offer Bisync support?
    A: Yes, the device supports Bisync.
  • Q: Are serial protocols, specifically EIA-232, supported?
    A: Yes, the device supports the EIA-232 serial protocol.
  • Q: What are the device's environmental and emission standards compliance?
    A: The device complies with EN300386, EN55024/CISPR24, EN50082-1 for immunity and FCC Part 15 Class A, ICES-003 Class A, EN55022 Class A, CISPR22 Class A, AS/NZS 3548 Class A, VCCI Class A for emissions.
  • Q: What is the form factor and dimensions of the device?
    A: The device has a single wide form factor, with dimensions of 1.58 in. in height, 7.44 in. in width, and 7.5 in. in depth.
  • Q: What are the operating and storage temperature ranges for the device?
    A: The operating temperature range is 0 °C to 40 °C, and the storage temperature range is -40 °C to 70 °C.

Product Review

The Cisco SM-32A module offers 32 EIA-232 asynchronous ports, making it suitable for high-density deployments on Cisco 2900 and 3900 series platforms, with WAN aggregation and traffic transport across TCP/IP networks supported. However, the lack of synchronous support and network clock synchronization may limit its application in environments requiring these features. It also boasts compliance with multiple emissions and immunity standards, ensuring reliable operation in various conditions, but operates within a relatively narrow temperature range of 0°C to 40°C, potentially restricting its use in extreme environments.


The Cisco SM-32A module enhances the capabilities of Cisco 2900 and Cisco 3900 series routers by adding 32 asynchronous EIA-232 ports. This expansion is particularly valuable for organizations requiring high-density serial connections for equipment such as modems, switches, and routers. Its design adheres to a single wide form factor, measuring 1.58 inches in height, 7.44 inches in width, and 7.5 inches in depth, ensuring it fits seamlessly into compatible Cisco routers without requiring excessive space. Each of the 32 ports supports an asynchronous maximum speed of 230.4 kbps, facilitating efficient data transfer rates for connected devices. Despite its lack of synchronous support, the module compensates with bisync support, allowing for versatile serial communication options. The high-density 8-port connector type optimizes space and connectivity, making it easier to manage multiple connections in a compact environment. The module's compatibility with various serial protocols, specifically EIA-232, alongside its ability to perform lead manipulation, highlights its adaptability in different networking scenarios. However, it does not support network clock synchronization, which may limit its use in applications requiring precisely timed data transfers. In terms of environmental tolerance, the Cisco SM-32A is designed to operate within a temperature range of 0 °C to 40 °C and can be stored in temperatures ranging from -40 °C to 70 °C. Its humidity tolerance ranges from 10% to 90% noncondensing, ensuring reliable performance in diverse operating conditions. The module adheres to several immunity and emission standards, including EN300386, EN55024/CISPR24, and FCC Part 15 Class A, among others. These certifications signify its ability to operate within regulated safety and environmental guidelines, minimizing electromagnetic interference and ensuring user safety. Key features include: - WAN aggregation support, enabling the consolidation of multiple network connections into a single, more efficient connection. - Traffic transport across a TCP/IP network, allowing for the seamless integration of serial devices into modern IP-based networks. - Support for Cisco IOS software, ensuring compatibility with a wide range of network configurations and facilitating easy management and configuration through a familiar interface. The Cisco SM-32A module also supports specific cables, including the 8-Port EIA-232 Asynchronous Cable and the 8-Port Asynchronous Cable with 8 DB-25 Modem Connectors, ensuring users have the necessary tools for immediate deployment. Overall, the Cisco SM-32A module presents a practical solution for expanding the connectivity options of Cisco 2900 and 3900 series routers. Its focus on high-density asynchronous connections, combined with support for bisync and a range of environmental and safety standards, makes it a suitable choice for organizations looking to integrate a variety of serial devices into their network infrastructure.


Item NumberCisco SM-32A
Asynchronous EIA-232 Ports Count32
Port Connector Configuration8-Port High-Density
Compatible Cisco Series2900, 3900
Support for Synchronous OperationNo
Maximum Asynchronous Speed per Port230.4 kbps
Binary Synchronous CommunicationYes
Supported Serial StandardsEIA-232
Capability for Signal ControlYes
Network Time Protocol SupportNo
Compliance with Immunity StandardsEN300386, EN55024/CISPR24, EN50082-1
Compliance with Emission StandardsFCC Part 15 Class A, ICES-003 Class A, EN55022 Class A, CISPR22 Class A, AS/NZS 3548 Class A, VCCI Class A
Module TypeSingle Wide
Module Height1.58 in.
Module Width7.44 in.
Module Depth7.5 in.
Operational Temperature Range Low0 °C
Operational Temperature Range High40 °C
Storage Temperature Range Low-40 °C
Storage Temperature Range High70 °C
Operational Humidity Range Low10%
Operational Humidity Range High90%
Capability for WAN Link AggregationYes
IP Network Data HandlingYes
Required Operating SystemCisco IOS
Required Connection Cables8-Port EIA-232 Asynchronous Cable, 8-Port Asynchronous Cable with 8 DB-25 Modem Connectors

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