T1 Span Profile

The T1 Span Profile object creates a profile for a T1 DS-1. There are a total of (84) T1 DS-1'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 T1 profiles can be configured under the Profiles object. How to configure a profile for each TDM DS-1 is displayed below. 

Web GUI Page

Dialogic > Profiles > TDM Profiles > New T1 Span Profile

Open

Maximum Objects

Up to 64 T1 profiles can be created. Each configured profile can be used on any individual TDM DS-1.

Related Topics and Dependencies

Once the T1 Profile object is created and configured, each profile configured is then inserted into a drop down menu in the DS-1 Spans object. The Profile Name field within each TDM DS-1 object has a drop down menu which will display all the T1 Profiles created. Select the profile that will be associated with that particular DS-1.

DS-1 Spans

DS-3 Interface

Field Descriptions

Name

Click in the Profile Name field and enter a name that identifies the T1 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.

Framing

T1 Framing accepts inputs from 24 different sources, converts each individual source into Pulse Coded Modulated bytes and Time Division multiplexes the samples over a four wire facility. The two types of framing are D4 and ESF. Select which framing format will be configured in this T1 profile.

ESF (Extended Super Frame) (Default) - The Extended Superframe Format (ESF) extends the D4 superframe from 12 frames to 24 frames. ESF also redefines the 193rd bit location in order to add additional functionality.

D4 - The original framing format for T1 was D4 framing. A D4 frame consists of 192 data bits: 24 channels X 8 bits per channel and a single framing bit. D4 defines a 12-bit framing sequence which is sent as the 193rd bit in 12 consecutive frames. These 12 frames together are referred to as a superframe.

Signaling

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.

Line Length

The Line Length field specifies the length of the T1 line the T1 DS-1 will be using. The IMG 2020 automatically compensates for loss in decibels based on the distance from the IMG 2020 to the next in the network. Select from drop down menu

Line Coding

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.

B8ZS zero suppressing (Default) - B8ZS (Bipolar Eight Zero Suppression) signaling uses frames that are grouped into Extended Super-Frames (ESF). B8ZS with ESF is now the predominant T-carrier system. B8ZS allows a data rate up to 64 kbps and is used in both voice and data.

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 used for inband signaling.

Bit 7 zero suppressing - Bit 7 Zero Suppression the seventh bit is forced to a high or 1. Since the seventh bit is forced to a 1 then the byte becomes unreliable and is used primarily for voice and not data.