Envoy Modular Voice/Data Multiplexer
Specification List

• Interfaces: E1, T1, n x 8kb/s presented as RS232, RS449, EIA530, EIA530-A, V.35, V.36, or X.21 configured as DTE
• Link Protocol: Time division fixed frame
• Data Rates: Up to 2048kb/s, Selectable in 8kb/s steps on n x 8kb/s card. Selectable by time slot on E1/T1 cards
• Link Clock Source: Internal/External
• Connector: n x 8kb/s: 26-way D-type female with stub cable to present required protocol. E1 120 ohm RJ45 or 75 ohm BNC

• Channels: Two data channels per data card
• Interface: RS232, RS449, EIA530, EIA530-A, V.35, V.36, or X.21 synchronous data
• Connector: X.21 card:15-way D-type Male (DTE) or Female (DCE), Multi protocol card: 26-way D-type female with stub cable to present required protocol
• Synchronous Data Rates: n x 8kb/s to link rate less overhead

• Channel Format: Four voice channels per voice card, Maximum of 7 option cards per chassis (28 voice channels)
• Signalling: E&M, FXO or FXS selected per option card
• Voice Channel Impedance: E&M, 4 wire 600 ohm; FXO, FXS, 2 wire complex impedance
• Digitising: 2 bit ADPCM at 16kb/s, 3 bit ADPCM at 24kb/s, 4 bit ADPCM at 32kb/s, 8 bit PCM at 64kb/s. Digitising rates are selectable on a per channel basis
• Connectors: Four 8-way RJ45 sockets per option card

• Interface: V.24/V.28 configured to DCE 9.6kb/s async Note: Terminal connection controls and configures the multiplexer and options

• Data Rate: 10Mbps full-duplex operation
• Compliance: IEEE 802.3 industry standard
• Connectors: 10Base-T RJ45 socket
• Buffering: Transmit: 8 x 256-byte buffers, Receive: 120 x 256-byte buffers
• Protocols: ARP, ICMP, IP,TCP, UDP, SNMP (MIB-II)

• Enclosure/Chassis: 4U tall, semi-card cage
• Dimensions: 435mm x 310mm x 177mm
• Weight: Chassis excluding option cards, approximately 7 kg, Fully loaded multiplexer, approximately 12 kg
• Environment: Operating 0-40°C, 0-90% humidity non-condensing
• Power Supply: 100 - 240 VAC, 50 - 60Hz or 24/48 VDC option