Polycom RMX 1500 Administrator's Manual page 221

Method B (Using a gatekeeper):
In the Alias Name field, enter the MGC Prefix as registered in the
gatekeeper, EQ ID, Destination Conference ID, and Password, as
follows:
MGC Prefix EQ ID##Conference ID##Password (Password is
optional)
F o r E x a m p l e : 92 5 10 05 # #2 0 00 6# # 12 34
MCU Prefix as
registered in the
gatekeeper
7 Click the Advanced tab and in the Cascade field, select the Slave
option.
8
Click OK.
The cascade-enabled dial-out link is created and the system
automatically dials out to connect the participant to the local
conference, as well as the destination conference on the MGC.
Polycom RMX 1500/2000/4000 Administrator's Guide
Cascade-enabled Conference ID
EQ ID
Password (optional)
3-57