E1 Span Profile

The E1 Span Profile object creates a profile for an E1 DS-1. There are a total of (63) E1 DS1's on the IMG 2020 and on the rear of the IMG 2020, each DS-1 needs to have a profile associated with it to identify parameters such as Signaling, Framing, etc. Up to 64 E1 profiles can be configured under the Profiles object. How to configure a profile for each DS-1 is shown below.

Web GUI Page

Dialogic > Profiles > TDM Profiles > New E1 Span Profile

Maximum Objects

Up to 64 E1 and 64 T1 profiles can be created. Each configured profile can be used on each individual span/offset (DS-1).

Related Topics and Dependencies

Once the E1 Profile object is created and configured, each profile configured is then inserted into a drop down menu in the TDM DS-1 Spans object. The Profile Name field within each TDM DS-1 object has a drop down menu which will display all the E1 profiles created. Select the profile that will be associated with that particular DS-1.

Field Descriptions

Name

Click in the Name field and enter a name that identifies the E1 DS-1 Profile being created. A table of valid characters that can be used in the naming of each profile can be found in the Valid Characters topic. 

Coding Method

Line coding involves the manner in which bits are sent as well as providing a means of synchronization. Select the type of line coding to be used from drop down menu.

HDB3 (High Density Bipolar 3) (Default) - The HDB3 code is a bipolar signaling technique. It is very similar to B8ZS and is based on Alternate Mark Inversion (AMI). HDB3 extends AMI by inserting violation codes whenever there is a run of 4 or more 0's. This and similar (more complex) codes have replaced AMI in modern distribution networks. HDB3 is used in E1.

AMI (Alternate Mark Inversion) - AMI (Alternate Mark Inversion) signaling uses frames grouped into Super-Frames or D4 Framing. D4 framing is an older version of line coding. AMI limits the data rate to 56 kbps and is used for inband signaling.

Enable CRC4

Cyclic Redundancy Check 4 is a method that checks for errors in transmitted data on E1 trunk lines. CRC-4 support is required for all network switches in Europe. However, some older switches including private branch exchanges (PBXs) do not support CRC-4.

True  - Enable CRC4 on the span that this E1 Profile will be associated with

False (Default)  - Do not perform any error checking on the span that this E1 Profile will be associated with.

Line Impedance

Specifies whether the E1 interface located at the rear of the IMG 2020 is 75 ohm or 120 ohm. The Default for ITU is G.703 ITU-T (120 ohm)

Signaling Method

Clear Channel - Clear Channel (CCS) uses Out-of-Band signaling which is the transmission of signaling on a separate channel from the data/voice. SS7 and ISDN utilize Clear Channel signaling.

Transmit All Zeros

Specifies whether transmit all zeros is enabled or disabled.

False (Default) - Transmit all zeros is disabled

True - IMG 2020 will transmit all zeros. Typically used for troubleshooting

Layer 1 Management

Select from drop down menu which type of signaling is needed

E1 Layer 1 Mgmt (Default) - Default Variant used for SS7

Euro-ISDN E1 Layer 1 Mgmt - This variant is adopted by all of the European Countries and is used for ISDN (Europe).

Austel-ISDN E1 Layer 1 Mgmt - Variant issued by Austel in Australia and is used for ISDN (Australian Variant)

Default E1 Format

The table below shows the default format for E1 spans. You must enable Clear Channel signaling to use timeslot 16 as a voice channel for out-of-band signaling (for example, an ISDN application).