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This appendix contains system specifications.
This section provides general system information on the IGX 8. More detailed information on peripherals and cabling is available in the installation manual.
| 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: | At least 30 inches front; nominal 30 inches rear clearance;
12 inch side clearance. |
| 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: |
| · AC System | 10 A. 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. Six different power cords are available to comply with the standards of different countries. Power cords are six feet (approximately two meters) long. |
| DC Input Connections | 3-wire pluggable terminal block with screw terminal connectors. |
| Operating Environment: | 0° to 50° C (32° to 104° 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 m-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 (m-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. |
Digital Data Service Interface
| 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: | IGX 8 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 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. |
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