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NEAX2400 IPX Feature Programming Manual
Page 946 NDA-24297, Issue 1
M-39 Modem Pooling - CCIS
M-39 Modem Pooling - CCIS
General Description
This feature allows any terminal to have access to a data terminal in a different office through a concentration of
modem groups, set at different data speeds, using the Common Channel Inter-Office Signaling System.
A maximum of 8 Modem Groups are provided. One modem in the group is selected by the data station, at the time
of Modem Pool selection. Least Cost Routing and other standard PBX features can be used for optimization of long
distance data calls. Incoming Modem Pooling capabilities are also provided.
Operating Procedure
Outgoing Modem Pooling
Data Terminal connected to a Data Module
1. Key in DM CALL <ENTER>. READY is sent back.
2. Key in the number of the desired terminal in the distant office DIAL-XXXXXXXX <ENTER>.
3. CALLING is sent back.
4. The Outgoing Modem Pool is connected to the call.
5. WAITING is sent back when the called terminal is idle.
6. OPEN is sent back when the called terminal answers with Carrier Tone and both modems exchange
Carrier Tone.
7. Data transparency path is established.
8. Key in ESC DM <ENTER> to disconnect.
9. ACK is sent back. Key in RLS <ENTER>.
10. RELEASED is sent back when the path is disconnected.
Data Terminal connected to a D
term
/Data Adapter (Key Pad Dialing)
1. Lift the handset or press the SPEAKER key and receive dial tone.
2. Dial the desired terminal number.
3. Receive remote modem Answer Tone.
4. Press the DTX key on the D
term
. The Outgoing Modem Pool is transferred to the trunk.
5. WAIT D XXXXXXXX is displayed when the called terminal is idle.
6. READY D XXXXXXXX is displayed when the called terminal answers with Carrier Tone.
Service Conditions
1. Modem Pooling supports asynchronous data calls up to 1200 bps using analog trunks, depending on the
condition of the lines and modems used.
2. Up to 8 Modem Groups can be assigned total. There may be 8 Incoming or 8 Outgoing Modem Pool
Groups assigned, or 8 Bothway. Bothway groups are defined as Incoming and Outgoing.
3. One modem in the group is selected by the DTE at the time of Modem Pool connection.
4. Least Cost Routing can be used for optimization of long distance data calls.
5. Incoming Modem Pooling capabilities are also provided.
6. Modems must be compatible.
7. Acoustically Coupled Modems, Limited Distance Modems, Line Drivers and DSUs cannot be attached to
the Modem Pooling card.