System Components
1-7
■ 206EC/400EC Modules provide the same capabilities as the 206E and 
400E modules, respectively, but add support for Caller ID information on 
system display phones. To get Caller ID, first you must subscribe to the 
service from your local phone company (if it is available) on a per-line 
basis, then connect those lines associated with Caller ID to the line jacks 
on the 206EC and/or 400EC modules. Any users with system display 
phones who receive calls on Caller ID lines will get Caller ID. For more 
information, see ‘‘Caller ID’’. 
■ 308EC Expansion Module (Release 2.0 or later) provides expanded line 
and extension capability. It has jacks for three outside lines and eight 
extensions. Using combinations of modules, you can have a maximum of 
40 extensions with 15 lines (one ACS processor module and four 308EC 
modules) or 19 lines with eight extensions (one ACS processor module and 
four 400 modules). To get Caller ID, first you must subscribe to the service 
from your local phone company (if it is available) on a per-line basis, then 
connect those lines associated with Caller ID to the line jacks on the 
206EC, 308EC, and/or 400EC modules. Any users with system display 
phones who receive calls on Caller ID lines will get Caller ID. For more 
information, see ‘‘Caller ID’’. 
Hereafter, references to 206 modules include 206E, 206EC, and all 206 modules 
used with previous releases of the PARTNER product line. Similarly, references to 
400 modules include 400E, 400EC, and all 400 modules used with previous 
releases of the PARTNER product line. Any 200 modules can also be used.
If you want message-waiting capability on standard phones that are equipped with 
LED-compatible message-waiting lights, you must connect those phones to 
extension jacks on a PARTNER ACS processor module, a 308EC module, or on 
Release 3.0 (R3.0) or later 206 modules. 
NOTE:
Extension numbering is done dynamically. That is, when numbering 
extensions, the 200, 400, and PARTNER MAIL VS modules count as six 
extensions.
Table 1-1. Summary of Module Capacities
 Module Lines Extensions 
308EC 3 8
200 2 0
206 2 6
400 4 0
ACS 3 8