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by Cisco
Product Line: Cisco 2900 Series
Product Type: Integrated Services Routers
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Product Description

The GRWIC-1CE1T1-PRI is a single-wide network interface module featuring 1 port channelized T1/E1 and PRI with a RJ-48C connector, designed for flexible network connectivity. It supports line bit rates of 2.048 Mbps for E1 and 1.544 Mbps for T1, utilizing line coding schemes such as HDB3 for E1 and both AMI and B8ZS for T1, alongside various framing formats like CRC4 for E1 and SF/ESF for T1. Optimized for durability, it operates within a temperature range of -40ºF to 140ºF (-40ºC to +60ºC), withstands up to 30G shock, and functions up to 10,000 ft (3,048 m) altitude, ensuring reliability in diverse environmental conditions.

FAQs for the GRWIC-1CE1T1-PRI

  • What is the maximum data transfer rate of the 1 port channelized T1/E1 and PRI GRWIC?
    The maximum data transfer rate is 2.048 Mbps for E1 and 1.544 Mbps for T1.
  • How does the part connect to a network?
    It connects using an RJ-48C connector for T1/E1 WAN interfaces/ports.
  • What are the line bit rates for the supported network technologies?
    E1 operates at a line bit rate of 2.048 Mbps, and T1 operates at 1.544 Mbps.
  • Can you specify the line coding techniques used by this device?
    For E1, it uses High-density bipolar three (HDB3) coding, and for T1, it uses Alternate mark inversion (AMI) and binary 8-zero substitution (B8ZS).
  • What framing formats are supported by the 1 port channelized T1/E1 and PRI GRWIC?
    It supports CRC4 framing format for E1 and both Super Frame (SF) and Extended Super Frame (ESF) for T1.
  • Are there different output levels for E1 and T1?
    Yes, E1 supports short-haul and long-haul output levels, while T1 supports 0, -7.5, or -15 dB (line build-out [LBO]).
  • What is the form factor of this GRWIC?
    It has a single-wide GRWIC form factor with no slot restrictions.
  • What is the operating temperature range for the device?
    The continuous operating temperature range is -40 ºF to 140ºF (-40 to +60ºC).
  • How does the device perform under shock and vibration conditions?
    It is rated for 30G @11ms for shock and can operate up to 10,000 ft (3,048 m) altitude with a relative humidity of 5 to 95% non-condensing.
  • What are the physical dimensions and weight of the 1 port channelized T1/E1 and PRI GRWIC?
    The dimensions are 2.5" in height, 3" in width, and 7.8" in depth, with an approximate weight of 0.84 lb.

Product Review

The Cisco GRWIC-1CE1T1-PRI module offers a single port for T1/E1 and PRI connections, supporting both line bit rates effectively, which makes it versatile for various network infrastructures. However, the limitation to only one RJ-48C connector port may restrict scalability for larger network requirements. Its durability is ensured through a wide operating temperature range and resistance to harsh environmental conditions, making it reliable for deployment in diverse settings.


The Cisco GRWIC-1CE1T1-PRI is a versatile networking module designed to support both T1 and E1 connections. This module is equipped with a single port that can be configured for either T1 or E1 use, providing flexibility in connecting to different types of network infrastructures. The module features a compact form factor, making it an efficient choice for businesses looking to maximize their networking hardware in limited space. With an RJ-48C connector type, the module offers a reliable connection to your network. It supports a maximum data transfer rate of up to 2.048 Mbps for E1 connections, ensuring efficient data transmission. For T1 connections, it supports a data transfer rate of 1.544 Mbps. This capability allows for high-speed data transfer, making the Cisco GRWIC-1CE1T1-PRI an ideal solution for businesses requiring robust communication channels. The hardware specifications of the Cisco GRWIC-1CE1T1-PRI include: - Dimensions of 2.5 inches in height, 3 inches in width, and 7.8 inches in depth, with an approximate weight of 0.84 lb. This compact size ensures that it can be easily integrated into existing network setups without requiring significant space. - The module operates within a temperature range of -40 ºF to 140ºF (-40 to +60ºC) under continuous operating conditions, and it can withstand temperatures up to 185ºF (-40 to +85ºC) during type tests for 100 hours at 85ºC. This wide operating temperature range ensures reliability in various environmental conditions. - Designed to withstand physical stress, the module can handle shock and vibrations with a 30G impact at 11ms and operates efficiently at altitudes up to 10,000 ft (3,048 m). Its design also accounts for humidity, with a tolerance for 5 to 95% non-condensing relative humidity. Key features of the Cisco GRWIC-1CE1T1-PRI include: - Line bit rate support for both E1 and T1 ports, with E1 connections at 2.048 Mbps and T1 connections at 1.544 Mbps. This ensures compatibility with a wide range of network speeds and standards. - Line coding options include High-density bipolar three (HDB3) for E1 and Alternate Mark Inversion (AMI) and Binary 8-Zero Substitution (B8ZS) for T1, providing flexibility in configuring the module according to specific network requirements. - The module supports various framing formats, including CRC4 for E1 and Super Frame (SF) and Extended Super Frame (ESF) for T1, allowing for precise configuration to meet network protocol requirements. The Cisco GRWIC-1CE1T1-PRI is designed as a single-wide GRWIC, with no slot restrictions, offering ease of installation and compatibility with a wide range of Cisco routers. Its output levels are adjustable for both E1 and T1 connections, including short-haul/long-haul output levels for E1 and selectable line build-out (LBO) levels of 0, -7.5, or -15 dB for T1, ensuring optimal signal strength across various distances. In summary, the Cisco GRWIC-1CE1T1-PRI is a flexible and efficient networking module that supports both T1 and E1 connections, making it suitable for a wide range of networking applications. Its compact design, combined with its robust performance and adaptability, makes it an invaluable component in modern network infrastructures.


Item NumberCisco GRWIC-1CE1T1-PRI
Total Ports1
Port ConnectorRJ-48C
Port Configuration1 x RJ-48C for T1/E1 WAN
Supported Network ProtocolsT1, E1
Peak Data Rate2.048 Mbps
Dimensions (H x W x D)2.5" x 3" x 7.8"
Weight0.84 lb
Port Count1 to 2 T1/E1 ports utilizing RJ-48C connectors
Rate per PortE1: 2.048 Mbps, T1: 1.544 Mbps
Line Encoding MethodsE1: HDB3, T1: AMI, B8ZS
Data Frame TypesE1: CRC4, T1: SF, ESF
Signal LevelsE1: adaptable for short/long distance, T1: 0, -7.5, -15 dB
Module TypeSingle-width GRWIC, compatible with all slots
Continuous Operating Temperature-40ºF to 140ºF (-40ºC to 60ºC)
Test Operating Temperature-40ºF to 185ºF (-40ºC to 85ºC) for 100 hours
Impact Resistance30G @11ms
Max Operating Altitude10,000 ft (3,048 m)
Humidity Tolerance5 to 95% non-condensing
Temperature Range-40ºF to 185ºF (-40ºC to 85ºC)

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