Table Of Contents
Connecting High-Density Analog Telephony Network Modules
High-Density Analog Telephony Network Module
Connecting the High-Density Analog Telephony Network Module to the Network
Adding DSP Expansion Modules
Adding Port Expansion Modules
High-Density Analog Telephony Network Module LEDs
High-Density Analog Voice Card Pinouts
Connecting High-Density Analog Telephony Network Modules
This chapter describes how to connect high-density analog telephony network modules for Cisco modular routers. It contains the following sections:
•
High-Density Analog Telephony Network Module
• Connecting the High-Density Analog Telephony Network Module to the Network
• Adding DSP Expansion Modules
• Adding Port Expansion Modules
• High-Density Analog Telephony Network Module LEDs
• High-Density Analog Voice Card Pinouts
Tip To determine whether your router supports a specific network module, see Table 1-6 on page 1-16.
High-Density Analog Telephony Network Module
The high-density analog telephony network module is a modular, high-density voice network module that provides dual tone multifrequency (DTMF) detection, voice compression and decompression, call progress tone generation, voice activity detection (VAD), echo cancellation, and adaptive jitter buffering.
The high-density analog telephony network module supports two different expansion modules, providing up to 12 ports in addition to the 4 Foreign Exchange Service (FXS) ports on the base high-density analog telephony network module (NM-HDA). See Table 16-1 for expansion module support information.
Table 16-1 Expansion Modules Supported on the Cisco High-Density Analog Telephony Network Module (NM-HDA)
Expansion Modules
|
Port Type
|
Number of Ports
|
EM-HDA-8FXS
|
FXS
|
8
|
EM3-HDA-8FXS
|
FXS
|
8
|
EM-HDA-4FXO
|
FXO
|
4
|
EM2-HDA-4FXO
|
FXO1
|
4
|
These expansion modules can be used in the following combinations:
•12 Foreign Exchange Station (FXS) ports (NM-HDA with installed EM-HDA-8FXS and EM3-HDA-8FXS expansion modules)
•Ten Foreign Exchange Office (FXO) ports and four FXS ports (NM-HDA with two installed EM-HDA-4FXO or EM2-HDA-4FXO expansion modules)
•12 FXS and 4 FXO ports (NM-HDA with installed EM-HDA-8FXS, EM3-HDA-8FXS, and EM-HDA-4FXO or EM2-HDA-4FXO expansion modules)
The FXO expansion module supports a power failure port that connects directly to the central office (CO) in case of failure. Physical ports are added as shown in Table 16-2.
Table 16-2 Physical Ports on the High-Density Analog Telephony Network Module
Physical Port
|
Location
|
FXS Ports
|
FXO Ports
|
1-4
|
Default on card
|
1-4
|
—
|
5-14
|
Expansion module 0
|
5-12 FXS
13-14 Not used
|
5-8 FXO
9-13 Not used
14 Power failure port
Note Port 8 is hard-wired to port 14.
|
15-24
|
Expansion module 1
|
15-22 FXS
23-24 Not used
|
15-18 FXO
19-23 Not used
24 Power fail port
Note Port 18 is hard-wired to port 24.
|
25
|
Not used
|
—
|
—
|
Tip To maintain an emergency connection during power outages, connect port 14 or port 24 to the public switched telephone network (PSTN). Phones connected to port 8 or port 18 fail over to the PSTN connections through port 14 or port 24 during power outages.
The digital signal processors (DSPs) on the card support up to 8 ports of high-complexity codecs or up to 16 ports of medium- and low-complexity codecs. The number of DSPs must be increased if more than eight ports of high-complexity codecs are needed. In this case, a DSP expansion module must be installed.
The high-density analog telephony network module is connected to the network using an RJ-21 Amphenol connector on the front panel. The front of the card is shown in Figure 16-1.
Figure 16-1 High-Density Analog Telephony Network Module
Connecting the High-Density Analog Telephony Network Module to the Network
The high-density analog telephony network module is connected to a distribution frame with an RJ-21 cable. (See Figure 16-2.) RJ-21 cables are not provided with the network module. Some recommended cables are as follows:
•253PP10GYADI male-to-male cable and 253PC10GYADI male-to-female cable from Gray Bar
•AT125-SM patch panel (supports both male and female connection) from Gray Bar
For ordering information, see the "Obtaining Technical Assistance" section on page xi.
Figure 16-2 High-Density Analog Telephony Card Connected to a Main Distribution Frame
Adding DSP Expansion Modules
DSP expansion modules can be used if more than eight ports using high-complexity codecs are needed on the high-density analog telephony network module.
To install DSP expansion modules, follow these steps:
Step 1 Insert the connector on the DSP expansion module into the module connector on the network module. (See Figure 16-3.)
Note Be sure to press firmly on the DSP expansion module until the board seats onto the connector.
Step 2 Insert the screws from the hardware kit through the DSP expansion module into the brackets on the network module.
Step 3 Install the network module into the router, as described in the "Installing Cisco Network Modules in Cisco Access Routers" section on page 2-5.
Figure 16-3 Installing a DSP Expansion Module
Adding Port Expansion Modules
Port expansion modules can be used to increase the number of ports supported on the high-density analog telephony network module.
To install port expansion modules, follow these steps:
Step 1 Decide if the expansion board is going in the EM0 slot or EM1 slot, as shown in Figure 16-4.
Step 2 Insert the connector on the port expansion module into the module connector on the network module, as shown in Figure 16-4. Use the alignment pins on the bracket to correctly align the expansion module. If the pin does not properly align with the expansion module, the rear bracket can be adjusted by loosening the screw underneath the bracket and tightening it when the module is correctly in place.
Note Be sure to press firmly on the port expansion module until the board seats securely on the connector.
Caution For each expansion module, two mounting screws must be installed with 6-8 lbs-in (67.8 N-cm) of torque. Failure to properly secure the expansion module to the base module with two screws compromises product reliability.
In the case of FXO ports, failure to properly tighten both mounting screws causes FXO ground-start outgoing call operation to fail.
Step 3 Insert the screws from the hardware kit through the port expansion module into the brackets on the network module.
Warning Failure to secure the expansion module to the base module with two screws defeats the earth ground, causing a potential safety hazard. Statement 347
Figure 16-4 Installing a Port Expansion Module
Step 4 Apply the appropriate label on the front of the card, as shown in Figure 16-5.
Step 5 Install the network module into the router, as described in the "Installing Cisco Network Modules in Cisco Access Routers" section on page 2-5.
Figure 16-5 Label Locations for Expansion Ports
High-Density Analog Telephony Network Module LEDs
Figure 16-6 shows high-density analog telephony network module LEDs. Table 16-3 describes their meaning.
Figure 16-6 High-Density Analog Telephony Network Module LEDs
Table 16-3 High-Density Analog Telephony Network Module LEDs
LED
|
Meaning
|
EN
|
Green indicates that the module has passed its self-tests and is available to the router.
|
ACT
|
Green indicates that the module is ready to process data. It goes on when the boot process is complete and stays on during normal operation.
|
High-Density Analog Voice Card Pinouts
Figure 16-7 shows the RJ-21 connector wiring for the cable used for the high-density analog voice card; Table 16-4 lists the pinouts. The port usage depends on the type of expansion cards installed.
Figure 16-7 RJ-21 Connector Wiring
Table 16-4 RJ-21 Connections for the High-Density Analog Voice Network Module
RJ-21 Connector
|
NM-HDA Port
|
Network Module Reference
|
Pair
|
Tip Conductor
|
Ring Conductor
|
1
|
26
|
1
|
0
|
FXS
|
Base card
|
2
|
27
|
2
|
1
|
FXS
|
3
|
28
|
3
|
2
|
FXS
|
4
|
29
|
4
|
3
|
FXS
|
5
|
30
|
5
|
4
|
FXS
|
FXO
|
Expansion board in slot 0
|
6
|
31
|
6
|
5
|
FXS
|
FXO
|
7
|
32
|
7
|
6
|
FXS
|
FXO
|
8
|
33
|
8
|
7
|
FXS
|
FXO
|
9
|
34
|
9
|
8
|
FXS
|
Unused
|
10
|
35
|
10
|
9
|
FXS
|
Unused
|
11
|
36
|
11
|
10
|
FXS
|
Unused
|
12
|
37
|
12
|
11
|
FXS
|
Unused
|
13
|
38
|
13
|
12
|
Unused
|
Unused
|
14
|
39
|
14
|
13
|
Unused
|
FXO failover
|
15
|
40
|
15
|
14
|
FXS
|
FXO
|
Expansion board in slot 1
|
16
|
41
|
16
|
15
|
FXS
|
FXO
|
17
|
42
|
17
|
16
|
FXS
|
FXO
|
18
|
43
|
18
|
17
|
FXS
|
FXO
|
19
|
44
|
19
|
18
|
FXS
|
Unused
|
20
|
45
|
20
|
19
|
FXS
|
Unused
|
21
|
46
|
21
|
20
|
FXS
|
Unused
|
22
|
47
|
22
|
21
|
FXS
|
Unused
|
23
|
48
|
23
|
22
|
Unused
|
Unused
|
24
|
49
|
24
|
23
|
Unused
|
FXO failover
|
25
|
50
|
25
|
—
|
Unused
|
