AT&T Merlin II Feature Module 2 Data Communications Manual page 52

Modem Configuration Connected to a Dedicated Outside Line
MTDM Option Switches
SWITCH SETTINGS FOR A
TYPICAL MODEM POOL
The connectivity diagram seen in Figure 3-11 shows modem pool members
connected to dedicated outside lines. This configuration doesn't require a
BTMI.
FIGURE 3-11 Modem pool members connected to dedicated outside lines.
1
Digital
station
module
A 4-pair modular cord connects the MTDM to a jack on an 8-Digital
1
Station (008D) Module at the control unit. The maximum cable length is
1000 feet.
2 Standard RS-232-C connectors and cable connect the MTDM to the
modem. The maximum cable length is 17 feet.
3 A 2-pair modular cord connects the modern to the wall jack at which the
telephone company line terminates. (Dedicated lines aren't connected to
the MERLIN 11 system control unit.)
NOTE: If a number of MTDMs are to be connected at a common
location, you can put as many as eight in one multiple mounting
rather than installing each in a stand-alone mounting. A multiple
mounting reduces the number of ac power sockets needed to power
the MTDMs. See the documentation that came with your MTDM for
information on the multiple mounting connections.
The MTDM faceplate comes with two DIP option switches, one with 10
positions and the other with 12 positions. In addition, the RS-232-C Data
Interface Circuit Pack has an 8-position DIP option switch. You need to be
sure these switches are set correctly for operation with incoming and outgoing
modem pools in your MERLIN 11 system.
The example in Figure 3-12 shows switch settings for the M
baud outgoing modem pool. A note indicates how the settings would change
if this were an incoming modem pool. Review Figure 3-12, then refer to the
MTDM manual to set option switches for your equipment.
2
A
.
MTDM
Modem
MTDM Modem
3
Outside line
Outside tine
in a 1200
TDMS
Modem Pools 3-15