ESI 900 - Function 2133: CSU emulation programming; Function 2134: Switch protocol

IP Server 900 Programming Manual Function 2: CO line programming
E.14
Function 2133: CSU emulation programming
Use the arrow key to toggle between On and Off.
Default: Off.
If there is no external CSU, the CSU Emulation setting should be set to On but the remaining options
should be left at the default setting of Off. When CSU emulation is enabled, the following test options will
be available and should be used only at the request of the carrier:
• ATT PRF — Loopback test per AT&T spec 62411 for performance assessments, sent to the carrier on
ESF trunks only.
• ANSI PRM — Loopback test per ANSI spec T1.403 for performance assessments, sent to the carrier
on ESF trunks only.
• PLB (payload loopback) — Accepts signal from the carrier at the chip level, puts it through the framer
(de-frames and re-frames signal with data staying the same) and sends it back to the carrier. Used to
determine if the chip itself is functioning correctly.
• LLB (line loopback) — Sends the signal back right at the point it enters the chip before it hits the
framer. This helps determine if the line itself is good.
• NET LLB (network loopback) lets the carrier put the CSU of the DLC or DLC12 into any of the
loopback modes.
Function 2134: Switch protocol
Use the scroll keys to select from the four switch options for your carrier.
• Nortel — DMS100
• AT&T/Lucent — 5ESS
• National — NI2 (Default)
• Siemens — EWSD
Note: Most switches can emulate the various protocols. Please be sure to base your selection on the
protocol being used rather than the actual switch manufacturer. For example, your central office
could have a Nortel DMS 100 switch but have the span configured as NI2; in this instance, you would
select the option for National/NI2.
Warning: After changing the switch protocol, be sure to finish programming all other remaining options before
exiting programming mode (as needed, press # to accept current entries for function parameters
you’re not changing). Then, wait at least four full minutes and power-cycle the system.
(Continued)