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by Cisco
Product Line: Cisco 1800 Series
Product Type: Integrated Services Router
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Title: Surplus

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Product Description

The C1861-UC-2BRI-K9 Cisco integrates with two BRI ports and supports up to 8 users, featuring 4 FXS ports for connectivity. It is equipped with 256 MB DRAM and 128 MB flash memory, operating within a temperature range of 0 °C to 40 °C and supports a maximum altitude of 6000 ft at 31 °C. The device has a power dissipation of 80 W without IP phone support and 175 W with IP phone support, ensuring efficient energy consumption across various operational environments.

FAQs for the C1861-UC-2BRI-K9

  • What is the significance of the "WLAN Slot No" specification?
    The "WLAN Slot No" specification indicates that the device does not have a dedicated slot for Wireless Local Area Network (WLAN) cards, limiting its direct wireless connectivity capabilities.
  • Does the device support Survivable Remote Site Telephony (SRST)?
    No, the device does not support SRST.
  • Can the device provide support for Cisco Unified Communications Manager Express (CME)?
    Yes, the device supports CME, allowing it to provide call processing for Cisco IP phones.
  • How many Public Switched Telephone Network (PSTN) interfaces are available?
    The device is equipped with 2 Basic Rate Interface (BRI) ports for PSTN connectivity.
  • What is the maximum number of users the device can support?
    The device can support up to 8 users, making it suitable for small office environments.
  • How many Foreign eXchange Station (FXS) ports does the device have?
    There are 4 FXS ports available on the device for connecting analog devices such as telephones or fax machines.
  • What are the RAM and Flash Memory capacities of the device?
    The device comes with 256 GB of DRAM and 128 MB of flash memory for storing firmware, configurations, and voice messaging.
  • What are the power requirements for the device?
    It requires an AC input voltage of 100 to 240 VAC, with an input current ranging from 4 to 2 A, depending on the voltage.
  • What is the device's power dissipation during operation?
    Power dissipation is 80 W without IP phone support and increases to 175 W when supporting IP phones.
  • What are the operating temperature and humidity ranges for the device?
    The device can operate between 0 °C and 40 °C, with a relative humidity range of 10% (non-condensing) to 85% (non-condensing).

Product Review

The CISCO C1861-UC-2BRI-K9 offers a compact integration of voice and data services for small enterprises, featuring 2 BRI PSTN interfaces and support for up to 8 users, complemented by 4 FXS ports for analog device connectivity. However, the absence of WLAN slot and SRST support limits its deployment flexibility in environments requiring wireless connectivity and survivable remote site telephony. With 256MB DRAM and 128MB flash memory, it ensures adequate performance for basic operations, but the specified operating temperature and humidity ranges may restrict its use in harsher environments.


The CISCO C1861-UC-2BRI-K9 is a specialized networking device designed to meet the demands of small to medium-sized business communications. It integrates multiple services into a single unit, providing a streamlined solution for voice and data networking. This comprehensive overview focuses on its hardware specifications, delivering essential information for understanding its capabilities. Central to its design are the two Basic Rate Interface (BRI) ports, which facilitate the device's connection to the Public Switched Telephone Network (PSTN), enabling efficient voice communication. Accompanying these ports, the device supports up to 8 users, making it suitable for small office environments. It also features Cisco Unified Communications Manager Express (CME) support, allowing for sophisticated voice services management. For direct user connections, the device is equipped with 4 Foreign eXchange Station (FXS) ports. These ports are crucial for connecting analog devices such as telephones or fax machines, directly into the network. Internally, the device is powered by 256 MB of DRAM and a 128 MB flash memory, ensuring smooth operation and sufficient storage for firmware and configuration files. The hardware's power requirements are versatile, with an AC input voltage range of 100 to 240 VAC and an AC input current of 4 to 2 A. Power dissipation varies significantly based on operational mode, consuming 80 W without IP phone support and up to 175 W when supporting IP phones. Environmental conditions for operation are broad, with the device functioning optimally between 0 °C and 40 °C. It can operate in relative humidity ranging from 10% (non-condensing) to 85% (non-condensing) and at altitudes up to 6000 ft at 31 °C. Structurally, the device measures 2.625 inches in height, 10.5 inches in width, and 11.05 inches in depth, fitting into a 1.5 rack unit space. It weighs 8 lbs and operates with a noise level of 34 dBA at 25.6 °C, making it relatively quiet for office environments. Safety and compliance are ensured through adherence to standards including CAN/CSA-C22.2 No. 60950-1, EN 60950-1, and UL 60950-1. For connectivity and configuration, the device includes one console port, facilitating direct device management, and six voicemail ports, expanding its voice messaging capabilities. Key hardware features include:
  • Two BRI ports for PSTN connectivity
  • Four FXS ports for analog device connections
  • 256 MB DRAM and 128 MB flash memory for efficient processing and storage
In summary, the CISCO C1861-UC-2BRI-K9 combines essential voice and data networking functions into a single, compact device. Its hardware specifications cater to small business needs, providing a flexible and scalable solution for integrated communications. With support for Cisco Unified Communications Manager Express, it offers a comprehensive suite of voice services, making it an effective choice for businesses looking to enhance their communication infrastructure.


Model NumberCISCO C1861-UC-2BRI-K9
WLAN CapabilityNot Available
Survivable Remote Site Telephony (SRST)Unsupported
Cisco Unified Communications Manager Express (CUCME) FeatureSupported
Public Switched Telephone Network (PSTN) ConnectivityTwo BRI Interfaces
Maximum User Capacity8 Users
Analog Telephone Ports4 FXS Ports
System Memory256 MB DRAM
Storage Memory128 MB
Power Supply Voltage Range100-240 VAC
Input Current Range2-4 A
Energy Consumption80 W (without IP phone), 175 W (with IP phone)
Lowest Operating Temperature0 °C
Highest Operating Temperature40 °C
Minimum Humidity for Operation10% Non-Condensing
Maximum Humidity for Operation85% Non-Condensing
Maximum Operating Elevation6000 ft at 31 °C
Dimensions2.625 x 10.5 x 11.05 inches
Standard Rack Unit Height1.5 RU
Device Weight8 pounds
Audible Noise Emission34 dBA at 25.6 °C
Compliance and SafetyCAN/CSA-C22.2 No. 60950-1, EN 60950-1, UL 60950-1
Management Interface Ports1 Console Port
Voicemail Interface Ports6 Ports

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