System Specifications

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:

♦ 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 at -42 VDC max. per circuit

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 C for a list.

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).
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.
31-channel framed CEPT E1.

Voice Compression
Available:

32/24/16 Kbps ADPCM.
32 Kbps ADPCM.
Voice Activity Detection compression.

Compression Algorithm:

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

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 can be specified 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).

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.: changes normally follow data within 100 to 1000 msec. Fast EIA lead is 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 or 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, 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.

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.

Physical Layer Alarms

Loss of Signal, (LOS) Out of Frame (OOF), Alarm Indicator Signal (AIS), Remote Alarm Indicator (RAI).

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).

Jitter:

Meets G.823.

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 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.

Physical Layer Alarms

Loss of Signal, (LOS) Out of Frame (OOF), Alarm Indicator Signal (AIS), Remote Alarm Indicator (RAI)

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 m. (450 ft.) using specified cable.

Indicators:

RED Alarm
YELLOW Alarm
LOS
AI.

Type of Service:

Permanent Virtual Circuit (PVC)

Data Interface:

Per ITU-T I.122 and ANSI T1/E1 Standards

Data Transfer Protocol:

LAP-D frame level core functions

Input Data Format:

High Level Data Link (HDLC) protocol

Input Data Frame Length:

Maximum is 4096 bytes

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 per Port:

56 Kbps to 2.048 Mbps

No. of Physical Ports per Card:

4 ports on FRI-X.21 and FRI-V.35
1 port on FRI-T1 and FRI-E1
8 ports on UFI-8T1 and UFI-8E1 cards

No. of PVCs per Port:

252 per FRM card, distributed in any combination.
1000 per UFM 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 FRM
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 Ports per card:

4

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.