Cisco VWIC-1MFT-T1 Full Official Technical Specification Document

1. Product Overview

Official Full Designation

Core Definition

SKU Naming Breakdown

1. VWIC: Voice/WAN Interface Card, dual-purpose modular card supporting both voice trunking and WAN data connectivity
2. 1: One independent physical T1 trunk port integrated on the card
3. MFT: Multiflex Trunk, flexible timeslot partitioning for mixed voice and data services over one T1 span
4. T1: T1 1.544 Mbps North American digital trunk standard with 24×64 kbps timeslots
5. =: Optional suffix for standalone spare-only VWIC spare kits (VWIC-1MFT-T1=)

Product Lifecycle Notice

• Official Global Release Year: 2001
• End-of-Sale (EoS) Status: Discontinued; Cisco permanently halted production of brand-new VWIC-1MFT-T1 hardware units
• Direct Upgrade Replacement Model: VWIC2-1MFT-T1 second-generation multiflex trunk card with enhanced clocking and feature sets
• Minimum Supported IOS Software Version: Cisco IOS Release 12.1(1)T for base T1 data functionality; IOS 12.1(3)T required for full remote loopback and PRI voice featuresCisco
• Software Maintenance Status: Only critical security vulnerability patches are released for customers holding active Cisco DNA service contracts; no new feature enhancements will be developed
• Legacy Status: End-of-sale legacy hardware; certified refurbished spare modules, validated legacy IOS firmware images and 24×7 Cisco TAC engineering technical support remain available through authorized Cisco distribution partners

Supported Router Platform Compatibility

1. Cisco 1700 Series (1751, 1760 only; unsupported on 1720/1710 base models)
2. Cisco 2600 Series (2610, 2611, 2620, 2621, 2650, 2651, 2600XM, 2691)
3. Cisco 2800 Series ISR G2
4. Cisco 3600 Series Multiservice Routers (3620, 3640, 3660, 3631)
5. Cisco 3700 Series (3725, 3745)
6. Cisco 3800 Series ISR G2

Deployment Restrictions

1. No certified hot-swap capability: Power cycling the entire router chassis is mandatory for safe installation or replacement; live removal triggers immediate T1 trunk outages and persistent IOS system error logging.
2. Voice DSP hardware dependency: Packet voice trunking functions require companion voice network modules with dedicated DSP farms; the standalone VWIC-1MFT-T1 only supports pure T1/fractional T1 data connectivity without voice processing hardwareCisco.
3. Slot installation rules: May be installed either in dedicated WIC sub-slots of mixed-media network modules (NM-1E2W, NM-1FE2W, NM-2FE2W) or standard VIC voice slots on supported router platforms.
4. Clock synchronization limits: Multiple VWIC trunk cards deployed in one chassis require careful T1 clock source planning to avoid slip errors on voice timeslots.

Standard Factory Complete Bundle Contents

1. VWIC-1MFT-T1 base single-port multiflex T1 trunk VWIC card with front-panel RJ-48C T1 trunk port and dedicated trunk status LED indicators
2. Anti-static ESD handling storage bag
3. Quick-start hardware installation guide covering VWIC slot insertion, removal, T1 trunk cable wiring, timeslot partitioning configuration and basic IOS fractional T1 data / T1 PRI voice setup examples
4. Global regulatory compliance, safety, and electromagnetic interference (EMI) certification documentation packet

Core Integrated Functional Capabilities

• Single T1 1.544 Mbps multiflex trunk port with integrated fully managed CSU/DSU, eliminating external standalone CSU hardware and reducing branch rack equipment footprint
• Flexible 24-timeslot T1 channel partitioning architecture: Administrators may split the 24×64 kbps timeslots arbitrarily between data channel groups and voice trunk timeslots on the same physical T1 circuit
• T1 data WAN functionality support: Fractional T1 channel groups for HDLC, PPP and Frame Relay leased-line inter-site data connectivity; full T1 unchannelized high-speed WAN transport
• T1 packet voice trunk functionality support (with compatible DSP voice modules): T1 PRI ISDN trunking for PBX telephony interconnection, channelized VoIP trunking, FXS/FXO voice gateway services, fax over T1 transmission
• Comprehensive T1 line diagnostic and loopback tools: SF/ESF framing support, local/remote T1 line loopback initiation and detection, BER bit error rate testing, real-time T1 line alarm monitoring (Loss of Signal, Out of Frame, Alarm Indication Signal)
• Full IOS feature integration for data workloads: Static/dynamic routing (RIP, EIGRP, OSPF), IOS zone-based firewall, NAT/PAT, IPSec VPN tunneling, AAA identity authentication, QoS traffic shaping and policing for fractional T1 bandwidth control
• Full IOS voice feature integration (with DSP hardware): VoIP call routing, voice compression codecs (G.711, G.729a, G.726), echo cancellation, call admission control, voice trunk dial plan configuration, fax relay support

2. Hardware & Performance Specifications

Core T1 Trunk Transmission Performance

• Trunk Standard: ANSI T1.403 T1 digital trunk, total line rate 1.544 Mbps
• Timeslot Composition: 24 independent 64 kbps payload timeslots + 8 kbps framing overhead
• Supported Framing Types: Super Frame (SF), Extended Super Frame (ESF)
• Supported Line Coding: AMI (Alternate Mark Inversion), B8ZS binary eight-zero substitution line coding
• Physical Port Connector: Single RJ-48C female front-panel port for T1 trunk copper cable interconnection to carrier CO or PBX equipment
• Integrated CSU/DSU Functions: Line clock recovery, signal loss detection, AIS/RAI alarm generation, remote loopback activation, BER performance counters
• Data Link Encapsulations for Data Channels: HDLC, PPP, Frame Relay

Front Panel LED Indicator Definitions

1. LINK LED: Solid green = Valid synchronized T1 physical layer link established with remote equipment; off = No T1 signal detected
2. ACT LED: Blinking green = Active bidirectional data/voice timeslot traffic transmission/reception over the T1 trunk; steady off = No active payload traffic

Electrical & Thermal Specifications

Power Consumption

• Typical operating power draw under idle T1 trunk standby mode: ~11 Watts
• Maximum full-load power consumption under full 24-timeslot concurrent voice + data traffic: ~17 Watts
• Power Delivery: Powered exclusively through the router chassis network module WIC/VIC slot backplane; no external power supply connectors mounted on the VWIC card

Thermal & Environmental Operating Parameters

• Certified Continuous Operating Temperature Range: 0°C to 40°C (32°F to 104°F) standard data center/branch equipment room environment
• Extended Validated Short-Term Operating Temperature: 0°C to 55°C (32°F to 131°F)
• Storage & Transport Temperature Range: -40°C to 70°C (-40°F to 158°F)
• Operating Relative Humidity: 10% to 90% RH, non-condensing
• Storage Relative Humidity: 5% to 95% RH, non-condensing
• Operating Altitude: Certified operational range -150 m to 2,000 m (-500 ft to 6,500 ft); extended validated range up to 3,000 m (10,000 ft)
• Cooling Design: Fanless passive heat dissipation architecture without onboard cooling fans; cooling airflow supplied by the host router’s internal chassis fan assembly
• Airflow Direction: Horizontal cross airflow passing through the router chassis expansion slot bay

Physical Form Factor & Weight

• Form Factor: Standard low-profile single-wide VWIC modular expansion card form factor compatible with WIC sub-slots of mixed-media network modules and standalone VIC voice slots of supported ISR routers
• Bare VWIC Net Weight (without T1 trunk cables and accessory hardware): Approximately 90 grams

3. Regulatory & Compliance Certifications

1. Safety Standards: UL 60950-1, CSA C22.2 No. 60950-1, EN 60950-1, IEC 60950-1, GB 4943 Chinese national safety standard
2. EMC & EMI Standards: FCC CFR Title 47 Part 15 Class A, VCCI Class A, EN55022 Class A, CISPR 22 Class A, ICES003 Class A
3. T1 Telecommunications Compliance: FCC Part 68, ANSI T1.403, North American T1 trunk loop interface certification standards
4. Environmental Directive: EU RoHS hazardous substance restriction compliance

4. Core Deployment Advantages

1. Converged Multiflex Voice-and-Data Single T1 Trunk Design: The flagship multiflex architecture enables arbitrary partitioning of 24 T1 timeslots between data and voice services over one physical trunk circuit. Enterprises avoid purchasing separate dedicated T1 leased lines for data and separate T1 PRI trunks for PBX telephony, drastically reducing monthly carrier line subscription costs and branch rack hardware footprint.
2. Integrated Managed CSU/DSU Eliminates External Hardware: Built-in fully functional CSU/DSU removes the requirement for standalone external channel service unit devices, cutting capital equipment expenditure, simplifying cabling layouts at remote branch sites, and enabling centralized IOS-based T1 line diagnostics and remote loopback troubleshooting without on-site technician visits.
3. Flexible Dual-Mode Deployment Investment Protection: The same VWIC hardware can be deployed in pure fractional T1 data-only mode for traditional IP leased-line branch interconnections, or upgraded later to mixed voice-and-data T1 PRI trunk mode simply by adding compatible DSP voice network modules. Customers preserve their T1 trunk interface hardware investment as branch networks migrate from data-only to converged VoIP telephony architectures.
4. Comprehensive T1 Line Diagnostics and Remote Troubleshooting Toolset: Native support for ESF framing, remote line loopback activation, BER testing and real-time T1 alarm monitoring allows network administrators to remotely isolate T1 trunk copper line faults between the branch router and service provider central office, minimizing costly on-site field service dispatches and reducing branch network downtime.
5. Unified IOS Feature Set Compatibility for Both Voice and Data Workloads: The VWIC-1MFT-T1 is fully integrated with all core Cisco IOS routing, security, VPN, QoS, firewall and telephony feature suites. All data WAN and VoIP voice trunk configurations are managed through a single consistent IOS command-line interface, eliminating separate management systems for data and telephony infrastructure at branch locations.
6. Fanless Passive Cooling High-Reliability Low-Maintenance Architecture: The card utilizes a fanless passive heat dissipation design with zero moving mechanical fan components, eliminating mechanical failure risks and enabling stable 24/7 continuous unattended operation in remote unmanned branch equipment closets with minimal long-term maintenance requirements. Low power consumption reduces overall router energy draw and site cooling operational costs.

Supplementary Product Specification Notes

UNSPSC Classification Code

K9 Security Compliance Note

Factory Hardware Warranty Terms