This attribute specifies the maximum number of characters allowed
in a string represented by a codeword that the IWF supports. Each
codeword in a V.42bis dictionary represents a string of characters.
During Exchange Identification (XID) negotiation of parameter P2
(maximum string size), both sides (IWF and mobile or IWF and
Public Switched Telephone Network (PSTN)) agree on the
maximum string length to be used in the dictionaries. Changes to
this attribute impact the compression ratio for the encoder
(component GsmIwfV42bisOp attribute compRatioEncoder).
The negotiated value can be viewed in the component
GsmIwfV42bisOp attribute maximumStringSize. Changes to this
attribute do not effect existing calls.