Switch off hook switch hot line aka Direct One Way Hotline

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Hi,
I work a hotel and we have a number of 500 analog phones that automatically dial the front desk when you pick up the phone.
I thought i knoew how to switch it off so you get a dial tone but apparently not.
How do i revert the phone back to "normal" and eliminate the hotline aka "batphone" feature?
I am using this to switch it on:

> LD 10cr (Load Program 10.)
REQ : CHGcr
TYPE : 500cr
TN 9 7cr
ECHG YEScr
ITEM CLS MNLcr (Class of Service set to Manual.)
ITEM FTR HOT D 4 xxxxcr (Assign a Direct Hotline to call extension xxxx.)
FTRcr
ITEMcr
REQ : ENDcr (Exit Program 10.)

for now i am outing the hotline phone and copying over a phone that has dial tone.

I know some of you guys are in the UK, so you may not get the "Batphone" reference. Its from the 60's tv show. Commissioner Gordon would pick up a special red phone and it would automatically call stately Wayne manor and Batman, where upon Commish would say something like "That Nefarious No Goodnik the Riddler has struck again!" Timeless!(They just dont write em like that anymore.)

Nortel Meridian1
Version 2511
Release 25
Issue 8

 

[Trason]

ftr xhot

 

[epcompx2]

CLS DTN

 

[GUIsareapassingfad]

Thank you gentlemen,
This is the Cript i run:
REQ: chg
TYPE: 500500
TN 20 0 13 15
ECHG no
CDEN
DES C314
DES
WRLS
DN
AST
IAPG
HUNT
TGAR
LDN
NCOS
RNPG
XLST
SGRP
CLS DTN
SCI
MLWU_LANG
PLEV
FTR xhotprtr500

and that seems to do it!


Nortel Meridian1
Version 2511
Release 25
Issue 8