Embedded Modem Developer's Guide

Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 85
Short Form Long Form
196 +MRR: 29333
197 +MRR: 30667
198 +MRR: 33333
199 +MRR: 34667
200 +MRR: 37333
201 +MRR: 38667
202 +MRR: 41333
203 +MRR: 42667
204 +MRR: 45333
205 +MRR: 46667
206 +MRR: 49333
207 +MRR: 50667
208 +MRR: 53333
209 +MRR: 54667