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set t1e1 profile (Passport 4430/4450/4455 units)

Use set t1e1 profile to set a profile of T1/E1 line parameters. Profiles can be set for either local or network T1/E1 lines.

You must enter the profile number :INTEGER (1..2) for each of the following objects:

Object 

Parameter

Description

<e1CRC4Status>

: disable | enable

Enables the CRC-4 cyclic redundancy check feature. When enabled, the E1 Access Module generates and monitors for the CRC algorithm carried on bit 1 of timeslot 0 of an E1 frame.

<e1LineCode>

: ami | hdb3

Selects either AMI or HDB3 line code.

  • ami indicates that HDB3 suppression is disabled. When AMI is selected, you must ensure that the Data Terminal Equipment is generating at lease one 1 in every four bits.
  • hdb3 (High Density Bipolar 3), a ITU-TSS-recommended coding method which limits the maximum number of consecutive zeros to three.

<e1TS16Connection>

 

: toCAS | idle | bypass | toDataPort1| toDataPort2

Specifies the signaling system to be used in time slot 16.

  • toCAS supports G.704 channel associated signaling. In this method, a multiframe structure of 16 consecutive frames numbered 0 through 15 is used. In each frame, time slot 16 allocates four bits to two channels in the following pattern: Frame 0 = multiframe alignment; Frame 1 = ABCD of Ch 1 and ABCD of Ch 16; frame 2 = ABCD of Ch 2 and ABCD of Ch 17; etc., up to frame 15.

<idleCode>

: INTEGER (0..255)

Sets the idle code for the DS0 channels. Values range from 0 to 255. Specify the profile number (1 or 2).

<t1BuildOut>

: lessThan110feet | lessThan220feet | lessThan330feet | lessThan440feet | externalLBO | greaterThan665feet| lessThan550feet | lessThan660feet

Specifies cable length attached to the line. Specify the profile number (1 or 2).

<t1FrameFormat>

: superFrame(D4) | extendedSuperFrame(ESF)

Sets the profile for either superframe (D4) or extended superframe (ESF). Superframe consists of 12 frames and extended superframe consists of 24 frames.

<t1LineCode>

: ami | b8zs

Sets either AMI or B8ZS zero suppression. AMI disables B8ZS suppression; however, a bit density requirement is created which can be satisfied by assuring that the DTE is generating at least one 1 in every byte. Voice is not affected as PCM code does not allow bytes without a 1.

<t1LoopbackStatus>

: disable | enable

Used to enable T1 network-invoked loopback tests. When enabled, the T1 Access Module recognizes and responds to network-invoked loopback commands. When disabled, the T1 Access Module will not respond to network-invoked loopback commands.



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