Cisco VWIC-2MFT-T1-DI 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 expansion card supporting both voice trunking and WAN data connectivity
2. 2: Two independent physical T1 trunk ports integrated on a single expansion card
3. MFT: Multiflex Trunk, flexible arbitrary timeslot partitioning for mixed voice and data services over a single T1 span
4. T1: ANSI T1.403 North American digital trunk standard, 1.544 Mbps line rate with 24×64 kbps DS0 timeslots per port
5. DI: Drop-and-Insert, exclusive hardware TDM cross-connect function between dual T1 ports (the core differentiator from standard VWIC-2MFT-T1)
6. =: Optional suffix for standalone spare-only VWIC spare kits (VWIC-2MFT-T1-DI=)

Product Lifecycle Notice

• Official Global Release Year: 2001
• End-of-Sale (EoS) Status: Discontinued; Cisco permanently halted production of brand-new VWIC-2MFT-T1-DI hardware units
• Direct Upgrade Replacement Model: VWIC2-2MFT-T1 second-generation dual-port multiflex trunk card with independent per-port clocking and enhanced diagnostic feature sets
• Minimum Supported IOS Software Version: Cisco IOS Release 12.0(5)XK for base T1 data functionality; IOS 12.1(3)T required for full Drop-and-Insert TDM cross-connect and T1 PRI voice feature support
• 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 dual T1 trunk outages and persistent IOS system error logging.
2. Shared single clock domain limitation: Both T1 ports share one common clock source; separate independent line clocking for each trunk is unsupported on this first-generation VWIC model. Drop-and-Insert operation requires identical framing and line coding on both T1 portsCisco.
3. Voice DSP hardware dependency: Packet voice trunking functions require companion voice network modules with dedicated DSP farms; the standalone VWIC-2MFT-T1-DI only supports pure T1/fractional T1 data connectivity without voice processing hardware.
4. 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.

Standard Factory Complete Bundle Contents

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

Core Integrated Functional Capabilities

• Exclusive Hardware Drop-and-Insert (D&I) TDM Cross-Connect Functionality: The flagship DI feature enables administrators to drop selected DS0 timeslots off one T1 trunk port and insert those timeslots into vacant DS0 positions on the second T1 port, all processed locally on the VWIC without external T1 multiplexer hardware. This creates a hardware-based T1 cross-connect for voice/data circuit bridging, inter-site PBX trunk bypass, and carrier T1 circuit consolidationCisco.
• Dual fully independent T1 1.544 Mbps multiflex trunk ports, each equipped with a fully hardware-managed integrated CSU/DSU, eliminating external standalone CSU hardware and reducing branch rack equipment footprint
• Flexible 24-timeslot T1 channel partitioning architecture per port: Administrators may split the 24×64 kbps DS0 timeslots arbitrarily between data channel groups and voice trunk timeslots on each physical T1 circuit independently
• T1 data WAN functionality support per port: Fractional T1 channel groups for HDLC, PPP and Frame Relay leased-line inter-site data connectivity; full unchannelized T1 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 per port: 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 per port
• Timeslot Composition per Port: 24 independent 64 kbps DS0 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 Connectors: Dual independent RJ-48C female front-panel ports (one dedicated connector per T1 trunk)
• Integrated CSU/DSU Functions per Port: Line clock recovery, signal loss detection, AIS/RAI alarm generation, remote loopback activation, BER performance counters
• Drop-and-Insert TDM Cross-Connect Hardware: Onboard dedicated TDM switching logic for DS0 timeslot cross-connect between Port 0 and Port 1, configurable via IOStdmgroupcommands
• Data Link Encapsulations for Data Channels: HDLC, PPP, Frame Relay

Front Panel LED Indicator Definitions (Per Individual T1 Port)

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 dual-port idle T1 trunk standby mode: ~16 Watts
• Maximum full-load power consumption under dual-port full 24-timeslot concurrent voice + data traffic plus active Drop-and-Insert TDM cross-connect: ~23 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 195 grams (0.43 lbs)

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. Exclusive Hardware Drop-and-Insert TDM Cross-Connect Function (Key Differentiator vs Standard VWIC-2MFT-T1): The native onboard TDM timeslot cross-connect eliminates costly external standalone T1 multiplexer equipment for circuit bridging, PBX trunk bypass and carrier T1 consolidation. Network operators can cross-connect selected voice/data DS0 timeslots between two separate T1 lines directly on the router expansion card, simplifying branch rack layout and reducing auxiliary hardware capital expenditureCisco.
2. Dual Independent T1 Multiflex Trunk High-Density Slot Utilization Design: Two fully isolated T1 trunk interfaces integrated within a single WIC/VIC expansion slot, eliminating the need to deploy two separate VWIC-1MFT-T1 single-port cards for dual-circuit T1 deployments. This design drastically reduces router WIC slot occupation and overall hardware capital expenditure for dual-leased-line and multi-PBX trunk branch network deployments.
3. Fully Isolated Per-Port Independent Configuration Flexibility: Each T1 trunk port operates with completely separated hardware controllers, supporting distinct T1 framing/line coding standards, independent timeslot partitioning schemes, separate WAN encapsulation protocols and dedicated voice trunk PRI configurations running simultaneously without cross-port resource contention. For Drop-and-Insert operation, only identical framing and line coding are required on both ports.
4. Converged Multiflex Voice-and-Data Single T1 Trunk Architecture Per Port: The flagship multiflex architecture enables arbitrary partitioning of 24 T1 DS0 timeslots between data and voice services over one physical trunk circuit on each port. Enterprises avoid purchasing separate dedicated T1 leased lines for data and separate T1 PRI trunks for PBX telephony on each circuit, drastically reducing monthly carrier line subscription costs and branch rack hardware footprint.
5. Integrated Managed CSU/DSU Eliminates External Hardware Per Port: Built-in fully functional independent CSU/DSU on each trunk port 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.
6. Flexible Dual-Mode Deployment Investment Protection: The same VWIC-2MFT-T1-DI hardware can be deployed in pure fractional T1 data-only mode for traditional IP leased-line branch interconnections, upgraded to mixed voice-and-data T1 PRI trunk mode simply by adding compatible DSP voice network modules, or leveraged for TDM cross-connect Drop-and-Insert circuit bridging use cases. Customers preserve their dual T1 trunk interface hardware investment as branch networks evolve from data-only to converged VoIP telephony and carrier circuit consolidation architectures.
7. Comprehensive T1 Line Diagnostics and Remote Troubleshooting Toolset Per Port: 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 on each independent trunk circuit, minimizing costly on-site field service dispatches and reducing branch network downtime.
8. Unified IOS Feature Set Compatibility for Both Voice and Data Workloads: The VWIC-2MFT-T1-DI is fully integrated with all core Cisco IOS routing, security, VPN, QoS, firewall and telephony feature suites. All data WAN, VoIP voice trunk and Drop-and-Insert TDM cross-connect configurations are managed through a single consistent IOS command-line interface, eliminating separate management systems for data and telephony infrastructure at branch locations.
9. 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