IMG 1010 - Rear Panel Description (DS3 Primary)

Illustration:

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Overview:

The above diagram illustrates the layout of the rear panel on the IMG 1010 DS3 (Primary I/O). An IMG 1010 with the Rear Panel Interface as shown above can be used as a Standalone DS3 system or can be utilized in an N+1 Redundancy scheme. See IMG 1010 - Rear Panel Description (DS3 Backup). The connectors on the rear panel provide the required interfacing to the GCEMS (Gate Control Element Management System) and to the IP/TDM Network. Below is a short description of each interface.

CTRL 0, CTRL 1 - 10/100  (Communication to EMS)

These two redundant 10/100BaseT Ethernet connectors provide communication with an external GCEMS or any other device that needs to be secure from the public network. The connectors do not interface with the internal Ethernet switch and are physically isolated from any network internal to the IMG 1010 . These auto-negotiating, full duplex connectors support MDIX (cable cross-over) which eliminates the need for crossover cables for point-to-point connections.

DATA 0, DATA 1 - 10/100/1000 (Data and Signaling over IP)

These two redundant 10/100/1000BaseT Ethernet connectors interface to the internal Ethernet switch. These connectors are used to communicate to all devices in the IMG that need to communicate over the public network. All internal connections are 10/100BaseT and are aggregated to 1000BaseT, if required. These auto-negotiating, full duplex connectors support MDIX (cable cross-over) which eliminates the need for crossover cables for point-to-point connections.

SIG 0, SIG 1 - 10/100 (Signaling over IP)

These two redundant 10/100BaseT Ethernet connectors interface to the internal Ethernet switch. These connectors can be logically isolated from the data network or can be used as connections to the data network via software configuration. The connectors bring in signaling over IP. These auto-negotiating, full duplex connectors support MDIX (cable cross-over) which eliminates the need for crossover cables for point-to-point connections.

Signaling/Timing Ports 0 - 3 (T1/E1 Signaling and Timing Span Connectors)

These four RJ-48 connectors are dedicated for T1/E1 interfaces. The connectors provide T1 with 100 ohm impedance and E1 with 120 ohm impedance. Any of the Signaling/Timing Spans support bearer traffic as well as signaling for the SS7, ISDN, and CAS protocols. Any of the four spans can be used to provide signaling, or bearer traffic.

Timing on Signaling Spans:

For more information on Timing see IMG 1010 - Network Timing

• Signaling Span 0 is pre-configured to accept Primary Loop Timing Source. This can not be configured through ClientView.

• Signaling Span 1 is pre-configured to accept Secondary Loop Timing Source. This can not be configured through ClientView

• Signaling Spans 2 & 3 along with any bearer span (T1, E1, or a DS1 on a DS3) can have primary or secondary loop timing sources assigned to them.
   

BEARER REDUNDANCY (Reserved for Future Development)

The IMG 1010 does not support 1+1 Redundancy. These connectors are reserved for future IMG 1010 development.

BEARER Tx/Rx BNC Connectors:

A DS3 line (also known as a T-3) is an ultra high-speed connection capable of transmitting data at rates up to 45 Mbps. A DS3 line is equal to approximately 672 regular voice-grade telephone lines and supports a DS3 signaling interface which is bipolar with Bit 3 Zero Substitution (B3ZS). The DS3 interface is a 75 ohm coax cable and must be made with true 75 ohm cable and connectors. The DS3 interface supports either T1 or E1 protocol but not both on same Physical IMG 1010. Support for either T1 or E1 Protocol is based on the value of the Host Flag setting in the dhcpd.conf file. See IMG 1010 - Setting Host Flags for more information on setting host flags.

Timing on Bearer Spans:

Any Bearer Span 0-27 (T1, E1, or a DS1 on a DS3) can be configured to accept a Primary or Secondary Loop Timing Source.
 

T1 Protocol on DS3 line (1.544 Mbps)

• Supports up to 672 DS3 Channels (28 Spans * 24 DS0's)

• Supports configuring 4 signaling spans as well (4 Spans * 24 DS0's)
   

E1 Protocol on DS3 line (2.048 Mbps)

• Supports up to 672 DS3 Channels (21 Spans * 32 DS0's)

• Supports configuring 3 signaling spans as well (3 Spans * 32 DS0's)
   

Ethernet Control, Signaling and Data Connector LEDs:

These Ethernet RJ-45 connectors contain two LEDs that provide the user with Ethernet status.

The figure below shows the RJ-45 Ethernet connector LEDs.

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