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.

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)

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 AC Power Cabling for details.

DC Input Connections

3-wire pluggable terminal block with screw terminal connectors.

Operating Environment:

0º to 50º C (32º to 104º F). 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.

Voice Channel Interface:

24-channel T1 (D4 format).
24-channel T1-ESF (using CVM8).
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 8 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:

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 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 8 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 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:

The IGX switch synchronizes to the nearest, highest-stratm clock available. Any T1, E1, T3, E3, OC3 (STM-1) line, trunk, or optional external clock inputs can serve a clock source.

Internal to Node Source:

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

Clocking Hierarchy:

Dynamic primary, secondary, and tertiary clocking

Without a defined external clock reference, the IGX defaults to its internal clock source.

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 8 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.