The BCM-CTM 4 port connects up to four analog CLID PSTN lines to the BCM system. The auxiliary port permits the connection of a 33.6+ Kbps modem, fax machine or single line analog telephone to line 1. When the auxiliary device is using line 1, the BCM system does not allow other telephones to use line 1. When a single line analog telephone is connected to the auxiliary port, it can be used as an emergency telephone.
The front faceplate of the BCM-CTM has four RJ-11 connectors
The BCM-CTM Faceplate also has two Status LED's:
Power (Indicates Operating Status)