Page 94 of 258 Bandwidth Management
Patch Number
A patch is required on the main office in order to invoke this feature. The patch number is MPLR 20259.
Dialing Plan Overview
Depending upon the type of dialing plan used in the network (Coordinated Dialing Plan [CDP], or Uniform Dialing Plan [UDP] or a combination of both) the general idea is to have all calls that are terminating at a branch office first dial a number that will get routed to the main office associated with that branch office. The main office recognizes this number as belonging to the branch office and appends a tandem prefix to this number using Digit Manipulation Index (DMI). The main office then routes the call to the branch office while accounting for the additional bandwidth used.
See Figure 18 for an example of a tandem call.
Figure 18
A call between two branch offices tandems through the main office
