Cisco MWR-1941-DC-2T1 Hardware Installation Guide - Page 21

Chapter 1 Overview of the Cisco MWR 1941-DC Router Fixed Interfaces • Two fixed LAN 10/100 Base-T Ethernet Ports • Three WIC/VIC expansion slots (third slot supported in Cell Site implementation only) • One network module slot (Cell Site DCN implementation only) • Redundancy support via a two T1/E1 WIC capable of port switching ON/OFF via relays (IP-RAN implementation only) • Console RS-232 port • Auxiliary Serial Port with hardware flow control • Front (connector side) to rear airflow using four 40mm, 10 CFM exhaust fans • + 27/-48 VDC (+/- 20 to 60 VDC supply tolerance) universal power supply • Three green chassis LEDs for Power (PS is operational), System Ready (software is up and running), and Activity (interrupts/packet transfers running) Fixed Interfaces The MWR 1941-DC router has two fixed LAN ports offering 10/100 Base-T Ethernet attachment. The ports are fully compliant with the IEEE 802.3 and 802.3U standards and integrate the media access control (MAC) functions and a dual-speed MII interface. Both ports can operate in half- or full-duplex mode and can run independently of one another. For each FE interface, there are two green LEDs, one for Link Integrity and one for Link Activity. Voice/WAN Interface Cards The Cisco MWR 1941-DC router supports the following Voice/WAN interface cards (VWICs): • 2-port T1/Fractional T1 Drop and Insert Multiflex Trunk Interface Card: VWIC-2MFT-T1-DIR(=) • 2-port E1/Fractional E1 Drop and Insert Multiflex Trunk Interface Card: VWIC-2MFT-E1-DIR(=) • 2-port Asynchronous/Synchronous WAN Interface Card: WIC-2A/S(=) Note The WIC-2A/S is supported by the Cell Site DCN implementation only with Cisco IOS Release 12.2(15)MC1a and later. IVWIC-2MFT-T1/E1-DIR The Cisco VWIC-2MFT-T1-DIR and VWIC-2MFT-E1-DIR VWICs support data applications on the Cisco MWR 1941-DC Mobile Wireless Edge Router for T1/E1 networks. These cards are dual-port, T1/Fractional T1 or E1/Fractional E1, Drop and Insert Multiplexers with integrated T1 CSU/DSUs or E1 DSUs. The T1 version supports framed and unframed traffic, and the E1 version supports framed traffic and unframed traffic that conforms to the ITU-T G.703 standard for full 2.048 Mbps bandwidth. The Drop and Insert multiplexer diverts (drops) streams of an aggregate Time Division Multiplexed (TDM) traffic stream, and introduces (inserts) different streams for transmission in the time slots that were previously occupied by the dropped streams. Each VWIC supports a limited channelized capability where the T1 or E1 can be flexibly split into two fractional channel groups, one on each port or two on one port. The switching operation can be maintained through router restarts and reloads of Cisco IOS software. 78-15827-06B0 Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide 1-5