Nortel Networks BCM200/400 - Manual (Page 61)

Chapter 2 Introducing the BCM hardware 61
BCM200/400 4.0 Installation and Maintenance Guide
4x16 media bay module
The 4x16 media bay module (MBM) provides both analog trunk connections and connections to
digital telephones. The 4x16 MBM provides connections for four analog trunk lines and 16 digital
telephones. Each of the four analog trunk lines support caller ID and disconnect supervision. An
auxiliary port next to the Line 1 port enables you to use an analog telephony device, such as a
modem, fax, or telephone, to share the trunk.
Figure 33 shows the 4x16 MBM. The 4x16 MBM has one RJ-21 connector and five RJ-11
connectors on the faceplate.
Figure 33 4x16 faceplate LEDS and connectors
Analog station media bay modules
The analog station media bay modules (ASM, ASM8, ASM8+, and GASM8) can connect to a
maximum of eight analog telecommunication devices. These devices are standard analog
telephones, cordless telephones, fax machines, answering machines, or modems. The maximum
speed for a modem connection is 28.8 kbit/s.
In addition to ASM8 features, the ASM8+ and GASM8 offer the following features:
• Visual Message Waiting Indicator (VMWI) — LED indicates to the end user that a message is
waiting.
• Disconnect supervision (Open Switch Interval [OSI] as per EIA/TIA 464) — indicates to the
attached device, in an established communication, that the connected device should release the
call (see disconnect supervision note).
• Caller ID — provides the name, phone number, and other information about the caller to the
end user at the start of the call.
• Firmware downloading capability — allows the system to upgrade the ASM8+ and GASM8
firmware at customer sites.
• Enhanced ringing capability — ASM8+ and GASM8 provide a ringing voltage of 2 REN/65 V
rms per port.
• Calling line identification (CLID)
• The GASM8 is designated as an ONS (on-premise station) port.