System Specifications

System Capacity:

1 shelf with 8 card slots.
Requires 2 dedicated front slot(s) for NPMs.
Requires 2 dedicated back slots for SCMs (1 slot with blank plate).
Up to 6 T1/E1 circuit ports.
Up to 6 T1/E1 packet trunks.
Up to 48 synchronous data ports.
Up to 25 Voice, Data, and/or Frame Relay Module groups.

Enclosure Size:

IGX 8 Standalone/Rackmount:
Height: 25 ins. (63.5 cm) standalone; 24.5 ins. (62.3 cm), rack
Width: 19.9 ins. (50.5 cm), standalone; 19 ins. (48.3 cm.), rack
Depth: 26.5 ins. (67.3 cm), standalone and rack-mount

Shipping Weight:

270 pounds (122.7 kilograms)

Clearance Requirement:

Min. clearance: 30 inches front; nominal 30 ins. rear; 12 ins. side.

Power Input Voltage:

AC system: 100 to 240 VAC (90-264 under-voltage and over-voltage tolerance), 47 to 63 Hz.
DC system: -42 to -56 VDC.
Each AC supply can provide up to 400 watts to the card shelves. Space for 4 power supplies.

Input AC Power
Connector:

IEC 16 Amp input connector. 6 different power cords are available to comply with the standards of individual countries. Power cords are 6 feet (about 2 meters) long. See appendix titled Cabling Summary in the IGX Installation Guide for details.

Current Requirements:

Configuration dependent - use Network Design Tool for exact requirements. For planning purposes, use the following:

♦ AC System

10 Amps Max. for 110 VAC, 5 A for 220 VAC.

♦ DC System

20 Amps max. at -48 VDC; 25 Amps at -42 VDC (worst case)

DC Input Connections

3-wire pluggable terminal block with screw terminal connectors.

Operating Environment:

0º to 40º C (32º to 104º F) normal operation (50º C up to 72 hours). Maximum 85% relative humidity.

Shock:

Withstands 10 G, 10 ms. at 1/2 sine wave.

Vibration:

Withstands 1/4 G, 20-500 Hz.

Heat Transfer to Room:

IGX 8: 2720 BTUs max.

System Capacity:

1 or 2 shelves, each with 16 card slots.
Requires 1 or 2 dedicated front slot(s) for NPMs.
Requires 1 dedicated back slot for SCM.
Up to 16 T1/E1 circuit ports.
Up to 16 T1/E1 packet trunks.
Up to 100 synchronous data ports.
Up to 25 Voice, Data, and/or Frame Relay Module groups.

Enclosure Size:

IGX 16 Standalone/Rackmount:
HT: 32.25 ins. (82 cm.), standalone; 31.75 ins. (80.7 cm.), rack
WD: 19.9 inches (50.5 cm), standalone; 19 inches (48.3 cm.), rack
DP: 26.75 inches (68 cm), standalone; 26 inches (66 cm.), rack

IGX 32 Standalone/Rackmount:
HT: 55.5 inches (141 cm.), standalone, 55 inches (139.7 cm) rack
WD: 19.9 inches (50.5 cm), standalone; 19 inches (48.3 cm.), rack
DP: 26.75 inches (68 cm), standalone; 26 inches (66 cm.), rack

Shipping Weight:

600 pounds (270 kilos) for a fully loaded IGX 32.
400 pounds (180 kilos) for a fully loaded IGX 16.

Clearance Requirement:

At least 30 inches front and rear clearance; nominal
12 inch side clearance.

Power Input Voltage:

AC system: 180 to 264 VAC, 47 to 63 Hz.
DC system: -42 to -56 VDC.
Each AC supply can provide up to 875 watts to a card shelf. Cabinet has space for 6 AC power supplies.

Current Requirements:

Configuration dependent: use Network Design Tool for exact requirements. For planning purposes, use the following:

♦ AC System

IGX 16/32: 16 Amps maximum at nominal voltage of 180 VAC.

♦ DC System

IGX 16: 24 Amps max. per circuit at -42 VDC (worst case)

IGX 32: 44 Amps at nominal -48 VDC; 50 Amps maximum per circuit at -42 VDC.

Input AC Power
Connector:

AC Power Distribution unit is the same for all cabinets shipped:
IEC 16 Amp input connector. Six different power cords available, depending on country of destination. See appendix titled "Cabling Summary" in the IGX Installation Manual for details.

DC Input Connections

DC power is the same for all IGX 16/32 cabinets shipped.
DC: 3-screw pluggable terminal connectors.

Operating Environment:

0º to 40º C (32º to 104º F) normal operation (50º C up to 72 hours).
Up to 85% relative humidity, non-condensing

Shock:

Withstands 10 G, 10 ms. at 1/2 sine wave.

Vibration:

Withstands 1/4 G, 20-500 Hz.

Heat Transfer to Room:

IGX 16: 4300 BTUs max, AC-powered system. 3600 BTUs in a DC-powered unit.
IGX 32: 8600 BTUs max, AC-powered system. 6800 BTUs in a DC-powered unit.

Voice Channel Interface:

24-channel T1 (D4 format).
24-channel T1-ESF (using CVM).
30-channel framed CEPT E1.

Voice Compression:

32/24/16 Kbps ADPCM on the CVM.
32/24/16 Kbps ADPCM or LDCELP on the UVM only.
Voice Activity Detection (VAD) compression.

Compression Algorithm:

ITU-T G.721, G.723, G.726.
StrataCom 32 Kbps ADPCM
StrataCom LDCELP

PCM Encoding Types:

Accommodates µ-Law or A-Law encoding,
End-to-end conversion available.

Channel Gain Control:

-8 dB to +6 dB.

Signalling Modes:

T1: Robbed bit or CCS (ISDN).
E1: Channel Associative Signalling (CAS) or Common Channel Signalling (CCS).

Signalling Conditioning:

Various make-busy and forced-idle routines during circuit alarm, configurable on a per-channel basis.

Quantizing Distortion Added:

2.5 Quantizing Distortion Units (QDU)s with 32 Kbps ADPCM over 1 hop plus 0.7 QDUs with Digital Loss PAD (µ-law or A-Law).

Nominal Transmission Loss

0 dB at 1 Khz.

Sync. Data Interfaces:

RS-232C/D, RS-449/422, V.24, X.21, and V.35
with IGX as DCE or DTE.

High-Speed Data Rates (HDM):

2.4 Kbps to 1.344 Mbps.

Low-Speed Data Rates:

2.4 to 19.2 Kbps per LDM port.

Ports per card:

LDI: 4 or 8.
SDI: 4.

Control Leads Supported:

SDI: Per interface standards.
SDI: Up to 7 in each direction for fast EIA.
LDI: 3 in each direction for DCE and DTE for each port.

Control Lead Sync
w/Data:

Control leads are sampled every 50 ms. and changes will normally follow data within 100 to 1000 msec. Fast EIA lead will be within 1 byte.

DS0A Interface:

Superrate, 56 Kbps to 512 Kbps (8 DS0s) per port.
Subrate: One 2.4/4.8/9.6/19.2/ or 56 Kbps per DS0
Per Bell TR-TSY-000458, TR-TSY-000280, TR-TSY-000083, and TR-TSY-000077.

Data Clocking:

Synchronous and isochronous clocking.
Normal, looped, and split clock configurations.

Pleisochronous
Clock Range:

± 2 percent of nominal data rate.

Ports per card:

Four.

Electrical Interface:

Digital Data System (DDS)—AT&T Pub. 62310, November 1987.

Interface Type:

DSU or OCU (software selectable).

Data Rates:

2.4, 4.8, 9.6, 19.2, and 56 Kbps (software selectable).

DDS Data Encoding:

Standard DDS Bipolar Return to Zero. Alternate Mark Inversion coding with bipolar violation sequences for zero suppression and control.

Data Compression:

Repetitive Pattern Suppression (RPS): 7, 8, or 16 bit pattern matching.

Synchronization Modes:

External (DSU only)
Looped (OCU only).

Control Codes Recognized:

Idle.
Zero Suppression.
Out-of Service.
Loopback Sequences.

Control Code Translation:

Translation of RTS to IDLE.

Alarm Code Translation:

Translation of the logical NOR of Out-of-Service
Sync Fail.
Excessive Bipolar Violations.
No Signal to DSR (DSU only).
No Signal to DTR (OCU only).

Connector:

ISO 4903, female DB-15 type connector.

Line Rate:

1.544 Mbps, ± 50 bps (± 200 bps VCO lock range).

Line Code:

Bipolar AMI or B8ZS.

Framing Formats:

Fractional T1, adjacent or alternating channels.
Minimum of four DS0 channels required.

Signal Level:

DSX-1 compatible.

Line Impedance:

Terminated = 100 Ohms nominal. Bridged = 1 KOhm.

Pulse Amplitude

Individual pulse amplitude 2.4 V-3.6 V (making a total base-to-peak amplitude of 6 V ± .6V)

Minimum Pulse Density:

Zero code suppression, either LSB or MSB.

Frame Format:

D4 and Extended Superframe (ESF).

VF Signalling:

Robbed bit D4 with A and B bits.

Max. Line Lengths:

Up to 533 feet with equalizers using ABAM cable.

Jitter Transfer:

Meets AT&T PUB 62411 specifications.

Jitter Tolerance:

Meets ANSI standards and AT&T PUB 62411 specs.

Connector:

DB 15 female.

Line Rate:

1.544 Mbps, ± 50 bps (± 200 bps VCO lock range).

Line Framing

ESF per AT&T TR 54016.

Frame Relay Interface

Meets ANSI T1.618, tw0-octet header.

Frame Relay Interface Rates

Either 56 Kbps or n x 64 Kbps, where 1 <= n <= 24. Sum of all n <= 24.

Number of Frame Relay Interfaces

1 - 24 occupied channels where 1 <= n <= 24, and the sum of all n <= 24.

Synchronization

Transmitter can be either loop-timed to receiver or synchronized to shelf (normal mode).

Line Code:

Bipolar AMI or B8ZS.

Framing Formats:

Fractional T1, contiguous DS0s/timeslots.
Minimum of four DS0 channels required.

Signal Level:

DSX-1 compatible.

Line Impedance:

Terminated = 100 Ohms nominal. Bridged = 1 KOhm.

Pulse Amplitude

Individual pulse amplitude 2.4 V - 3.6 V (making a total base-to-peak amplitude of 6 V ± .6V).

Minimum Pulse Density:

Zero code suppression, either LSB or MSB.

VF Signalling:

Robbed bit D4 with A and B bits.

Max. Line Lengths:

Up to 533 feet with equalizers using ABAM cable.

Input Jitter Tolerance:

Meets AT&T PUB 62411 specifications.

Output Jitter Tolerance:

Meets AT&T PUB 62411 specifications using normal mode synchronization.

Connector:

DB 15 female.

Line Rate:

2.048 Mbps, ± 50 bps (± 200 bps VCO lock range)

Line Code:

Bipolar AMI or HDB3

Line Impedance:

120 Ohms (balanced) or 75 Ohms (balanced or unbalanced)

Minimum Pulse Density:

Zero code suppression via HDB3 coding

Frame Format:

Unframed, 32-channel (G.703). Framed: 30 or 31-channel CEPT multiframe per ITU-T G.704.

VF Signalling:

CAS or CCS

Max. Line Lengths:

E1 output complies with G.703, so cabling must not exceed -6dB/1000 feet at 1024 kHz (applies to 75 Ohm coax or 120 Ohm twisted pair up to 350 meters or 1000 feet). StrataCom supplies cable with a maximum attenuation of 7 dB /1000 ft., so the maximum length of this cable is 850 feet (260 meters).

Jitter:

Meets G.823.

Electrical Interface:

Complies with G.703 Specification.

Connector:

DB 15 female or BNC.

Line Interface Connector

DB15 (120 Ohms), BNC (75 Ohms)

Line Rate:

2.048 Mbps, ±50 bps (±200 bps VCO lock range).

Frame Relay Interface

Meets ANSI T1.618, two-octet header.

Number of Frame Relay Interfaces

1-31 occupied channels where 1 <= n <= 31, and the sum of all
n <= 31

Frame Relay Interface Rate

Either 56 Kbps or n x 64 Kbps, where 1 <= n <= 31. Sum of all
n <= 31.

Line Code:

Bipolar AMI or HDB3.

Line Impedance:

120 ohms (balanced) or 75 ohms, balanced or unbalanced.

Minimum Pulse Density:

Zero code suppression via HDB3 coding.

Frame Format:

Unframed, 32-channel (G.703). Framed: 30 or 31-channel CEPT multiframe per ITU-T G.704.

VF Signalling:

CAS or CCS.

Max. Line Lengths:

E1 output complies with G.703, so cabling must not exceed -6dB/1000 feet at 1024 kHz (applies to 75 ohm coax or 120 ohm twisted pair up to 350 meters or 1000 feet).

Input Jitter Tolerance:

Meets G.703.

Output Jitter Tolerance:

Meets G.703.

Electrical Interface:

Complies with G.703 Specification.

Connector:

DB 15 female or BNC.

Required Hardware

AIT front card on the IPX, BTM front card on the IGX. The back card is the AIT-E2

Line Rate:

8.448 Mbps

Line Coding:

HDB3.

Cell Delineation

HEC

Physical medium

Coaxial

Line Length:

50 feet maximum; 6 feet nominal

Connector:

BNC, 75 Ohms.

Synchronization

Master/slave (NOTE: loop timing to IPX or IGX is allowed.)

Interfaces per card

One

Applicable Standards:

E2 specification and G.703.

Required Hardware

AIT front card on the IPX or BTM front card on the IGX. The back card is the AIT-HSSI.

Line Rate:

Presettable, programmable for the range 4 - 50.84 Mbps: increments depend on the attached DSU.

Line Coding:

NRZ.

Cell Delineation

PLCP

Physical medium

Multi-conductor, 25 twisted pairs in a ribbon cable, 110 Ohms.

Line Length:

50 feet maximum; 6 feet nominal

Connector:

50-pin, 50 mil SCSI type.

Synchronization

None—accepts DSU clocks

Interfaces per card

Single port.

Applicable Standards:

High Speed Serial Interface specification, March, 1990

I.432, G.804.

Line Rate:

44.736 Mbps ± 20 ppm, asynchronous.

Line Code:

B3ZS.

Clock Source Mode:

Internal (Asynchronous).

Signal Level:

DSX-3.

Framing Formats:

M13 mode, C-bit parity.

Alarms Processed:

AIS.
LOS.
Remote Alarm Indication.
Loss Of Framing.

Line Errors Counted:

BPV.
Parity Bit Errors.

Receiver Input Impedance:

Terminated = 75 ohms.

Transmission Modes:

Point-to-Point or Drop and Insert.

Jitter:

Meets ACCUNET T45 specification (Pub 54014).

Connector:

75 ohm BNC.

Max. Line Lengths:

450 ft. (137 m.) to DSX-3 using 75 Ohm coaxial cable.

Indicators:

RED Alarm.
YELLOW Alarm.
LOS.
AIS.

Line Rate:

34.368 Mbps ± 20 ppm, asynchronous.

Line Code:

HDB3.

Clock Source Mode:

Internal (Asynchronous).

Signal Level:

ITU-T G.703

Framing Formats:

ITU-T G.804, G.832,

Alarms Processed:

AIS.
LOS.
Remote Alarm Indication.
Loss Of Framing.

Line Errors Counted:

BPV.
Parity Bit Errors.

Receiver Input Impedance:

75 ohms unbalanced.

Transmission Modes:

Point-to-Point or Drop and Insert.

Jitter:

per ITU-T G.823.

Connector:

75 ohm BNC.

Max. Line Lengths:

137 meters (450 ft.) using specified cable.

Indicators:

RED Alarm.
YELLOW Alarm.
LOS.
AIS.

Type of Service:

Permanent Virtual Circuit (PVC).

Data Interface:

Per ITU-T I.122 and ANSI T1/S1 Standards.

Data Transfer Protocol:

LAP-D frame level core functions.

Input Data Format:

High Level Data Link (HDLC) protocol.

Input Data Frame Length:

Up to 4096 bytes max.

Frame Integrity Check:

Frame Check Sequence and CRC check of data frame. If CRC fails, data frame is discarded at receiving node.

Input Data Rate:

56 Kbps to 2.048 Mbps. (Max. rate available only with one of four ports/card active).

No. of Ports per Card:

4

No. of PVCs per Port:

252 per FR card, distributed in any combination.

Port Electrical Interface:

ITU-T V.35. IGX can act as a DCE or DTE for direction of control leads and timing.

Data Clocking:

Normal or looped.

Virtual Circuit Identifier:

Data Link Connection Identifier (DLCI).

Control Protocol:

Local Management Interface with XON/XOFF type flow control. IGX sets FECN and BECN bits in frame relay frame.

Bundled Connections:

252 virtual circuits per card
1024 virtual circuits per node.

Billing Time Accuracy:

Upon request from user device, IGX will provide GMT from any node accurate to within 1 second.

Type of Service:

Permanent Virtual Circuit (PVC)

Interface Types:

User-to-Network (UNI) and Network-to-Network (NNI) per ITU I.361 and I.363

Data Rates:

T3 or E3

ATM Layer:

Physical Layer Convergence Protocol per AT&T publication TA-TSY-00772 and 000773 for T3; ITU I-361 with HEC for E3

Cell Rate:

96,000 cells/sec. for T3, 80,000 cells/sec. for E3

Adaptation Layer:

AAL5

No. of PVCs per card:

255

VPI Addressing Range:

0-255

VCI Addressing Range:

0-65535

Traffic Queues:

CBR, VBR, and ABR

Management Protocol:

Interim Layer Management Interface (ILMI)

External Clock Sources:

IGX synchronizes to the nearest, highest-stratum clock available. Any E1 or T1 circuit line, trunk, or optional external clock input can be used as a clock source.

Internal to Node Source:

T1: 1.544 MHz, ± 10 ppm. (Stratum 4).
E1: 2.048 MHz, ± 10 ppm (Stratum 4).

Clocking Hierarchy:

Dynamic primary, secondary, and tertiary clocking.

Network Control Terminal:

StrataView Plus workstation and StrataCom software required for graphical display of network status, statistics gathering and display, and automatic downloading of software.

Control Terminal:

DEC VT100, WYSE 85, Televideo 970 or equivalent terminal for basic system configuring and alarm monitoring.

Remote Alarm Reporting:

Auto-dial modem connects to one of two control ports on each IGX node for automatic reporting of network alarms.

Remote Diagnostics:

Auto-answer modem connects to one of two control ports on each IGX node for remote diagnostic access by StrataCom ISC or other authorized personnel.

Network Control Ports:

Two ports per node, (one RS 232C interface and one Ethernet LAN port).

Alarm Notification:

Status of all trunks and nodes in network distributed to and stored by each individual node. Reported to StrataView Plus workstation at connecting node.

External Alarms:

Meets Bellcore Compatibility Bulletin #143 and AT&T Technical Reference PUB 43801 DS1 (T1) facility alarm requirements when equipped with DTI group.

Indicators and Controls:

Active and Fail lights on all cards and power supplies.