CONVENTIONAL PATCH MODULE (CPM)

SECTION 21 CONVENTIONAL PATCH MODULE (CPM)
21.1 DESCRIPTION

Refer to 3000 Series Switch Service Information manual, Part No. 001-3139-102, for the component layout, parts list and schematic. Refer to Figure 8-1 for the Basic Board Block diagram.

The Conventional Patch Module (CPM) is used to dynamically patch a single conventional channel to a single trunked group. The Switch can hold two CPMs per MCM. The CPMs must be adjacent to the controlling MCM (e.g. the MCM is at Slot 8005 so the CPMs must be placed in Slots 8006 and 8007). No other cards may be placed in these slots. If the user wishes to patch a conventional channel to more than one trunk group the following procedure must be used.

1.A trunk group is chosen for the CPM patch, (e.g. Site 1, Home 1, Group 1 (S1H1G1) and the conven- tional channel is chosen or vice versa.

2.The trunk group chosen for the CPM patch (S1H1G1) must be placed in a group patch with the other trunk groups for the patch in a Wide Area Module (WAM) patch.

A CPM with direct connection is associated with only one group code and uses a form of Type II E&M lead input similar to the mobile PTT.

The CPM connect the 4-Wire 600 ohm balanced audio with the Pulse Code Modulation (PCM) data paths and communicates to other modules via the Intra-Terminal Data Bus (IDB). The CPM also monitors the Channel Interface Module (CIM) Channel Status Bus (CSB) to determine if a CIM is active with a CPM group.

21.2 PCM SETUP PROCEDURE

21.2.1 SWITCH SETTINGS

Refer to Figure 21-1for Alignment Points diagram.

Command and Control Communication

The command and control communication to the Consoles may takes place by direct contact with E&M input and output.

Table 21-1 CPM SWITCH SETTINGS

Switch

Open Sections

 

Close Sections

 

 

 

 

 

 

 

 

 

 

S1

1

2

-

4

-

-

3

-

S3

1

2

3

4

-

-

-

-

S4

1

2

3

4

-

-

-

-

S5

-

-

-

-

1

2

3

4

 

 

 

 

 

 

 

 

 

21.2.2 CPM JUMPER PLACEMENT

Table 21-2 CPM BOARD JUMPER

PLACEMENT

JU

Pin

Description

 

 

 

J24

1 to 2*

Selects 27512 EPROM operation

 

2 to 3

Selects 27256 EPROM operation

J27

1 to 2

Not Used

 

2 to 3*

Normal Operation

P33

1 to 2*

No personality card attached

 

3 to 4*

No personality card attached

 

5

open

 

6

open

J36

1 only*

Not used

 

1 to 2

-48V E-lead operation

 

2 to 3

-15V E-lead operation

J14

Jumper pin 1 to 2 for high impedance ground path

J15

for split 600 ohm inputs and outputs. Leave open if

J21

no ground path desired.

J22

 

 

*Setting for Normal operation.

21-1