| Chapter 4 - Commands | 
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VALUES:  | n = 4 or 5 | 
DEFAULT: | &T5  | 
DESCRIPTION:  | &T4 selects Enable Response to Request for Remote  | 
  | Digital Loopback.  | 
  | &T5 selects Disable Response to Request for Remote  | 
  | Digital Loopback.  | 
COMMAND:  | #Tn  | 
VALUES:  | n = 0 or 1  | 
DEFAULT:  | #T1  | 
DESCRIPTION:  | #T0 turns off Trellis Coded Modulation  | 
  | #T1 turns on Trellis Coded Modulation  | 
COMMAND:  | Un  | 
VALUES:  | n = 0, 1, 2, or 3  | 
DEFAULT: | n/a  | 
DESCRIPTION:  | U0 places modem in Analog Loop Originate Mode.  | 
  | U1 places modem in Analog Loop Answer Mode.  | 
  | U2 places modem in Remote Digital Loopback test mode.  | 
  | U3 places modem in Local Digital Loopback Test Mode.  | 
COMMAND:  | Vn  | 
VALUES:  | n = 0 or 1  | 
DEFAULT: | V1  | 
DESCRIPTION:  | V0 means Result Codes sent as digits(terse response).  | 
  | V1 means Result Codes sent as words (verbose response).  | 
COMMAND:  | W  | 
VALUES:  | n/a  | 
DEFAULT:  | n/a  | 
DESCRIPTION:  | Wait for new   | 
COMMAND:  | &Wn  | 
VALUES:  | n = 0 or 1  | 
DEFAULT: | &W1  | 
DESCRIPTION:  | &W0 causes modem to store its current parameters in non-  | 
  | volatile RAM, and modem will load these for future  | 
  | sessions instead of reading factory ROM defaults, unless  | 
  | &F command used.  | 
  | &W1 causes modem to not store parameters.  | 
COMMAND:  | Xn  | 
VALUES:  | n = 0, 1, 2, 3 or 4  | 
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