Intercom Code Charts
The following charts are provided for you to list your Intercom codes. Each telephone number has been assigned an intercom code, and depending on your switch type, you must press 
# either before or after the Intercom code number. These Intercom codes have been programmed by Verizon. Instructions for using the Intercom feature are found below and also on page 14 of this guide.
To make an Intercom call:
Pick up the handset and listen for dial tone.
Press the Intercom code 
2 
0 
# – 
4 
9 
# 
# 
2 – 
# 
7 (DMS 10).
GTD-5, 5ESS and DMS 100 Intercom Code Chart
Name | Code | Telephone Number |
20#
21#
22#
23#
24#
25#
26#
27#
28#
29#
30#
31#
32#
33#
34#
35#
36#
37#
38#
39#
40#
41#
42#
43#
44#
45#
46#
47#
48#
49#
46 | 47 |
