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This chapter describes the multichannel DS1/PRI port adapters and contains the following sections:
The multichannel DS1/PRI port adapter (PA-MC-2T1, PA-MC-4T1, and PA-MC-8T1 versions) is a single-wide module that integrates channel service unit (CSU) functionality, data service unit (DSU) functionality, and DS0 channel support into the Cisco router. The PA-8DSX1 version integrates DS1 data service unit (DSU) functionality and DS0 channel support into the Cisco router.
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Note The Catalyst RSM/ does not support the PA-MC-2T1 multichannel DS1/PRI port adapter. |
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Note The Catalyst 6000 family FlexWAN module supports the PA-MC-8T1 multichannel DS1/PRI port adapter only. |
The multichannel DS1/PRI port adapter provides two, four, or eight independent T1 (100 ohm) connections using RJ-48C connectors. (See Figure 1-1, Figure 1-2, and Figure 1-3.) Each multichannel DS1/PRI port adapter can provide up to 128 separate full-duplex HDLC DS0, fractional, or full T1 channels.
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Note Each port adapter has a handle attached, but this handle is occasionally not shown in this publication to allow a full view of detail on the port adapter's faceplate. |
When you are running channelized T1, each DS1 interface can provide up to 24 T1 channel groups, which are numbered from 0 to 23. Each channel group provides up to twenty-four 64-kbps time slots (DS0 channels), which are numbered 1 to 24. Multiple time slots can be mapped to a single channel group. Each channel group is presented to the system as a serial interface that can be configured individually. Usable bandwidth for each channel group is calculated as n x 56 kbps or n x 64 kbps, where n is a number of DS0 time slots (1 to 24).
When you are running ISDN PRI, each DS1 interface provides 23 bearer (B) channels that can transmit and receive data at the rate of 64 kbps, full-duplex, and one data (D) channel that can transmit and receive data at the rate of 16 kbps, full-duplex. The B channels are used for transmitting user data. The D channel is used for call setup control and network connection teardown, and provides the communication from the router to the ISDN switch. The B and D channels are presented to the system as serial interfaces that support High-Level Data Link Control (HDLC) and PPP encapsulation. The multichannel DS1/PRI port adapter supports dial-on-demand routing (DDR) when you are running ISDN PRI.
Each of the T1 channels on the multichannel DS1/PRI port adapter uses a portion of the T1 bandwidth (fractional T1) or the entire T1 bandwidth for data transmission. Usable bandwidth for each T1 is n x 64 or n x 56 kbps, where n is a number from 1 to 24. When you are not running at full T1 speeds, the unused portion of the T1 bandwidth cannot be used and is filled with idle channel data.
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Note T1 time slots on the multichannel DS1/PRI port adapter are numbered 1 to 24, instead of the zero-based scheme (0 to 23) used with other Cisco products. This numbering scheme is to ensure consistency with telco numbering schemes for T1 channels within channelized equipment. |
The multichannel DS1/PRI port adapter supports facilities data link (FDL) in Extended Superframe (ESF) framing, as well as network and payload loopbacks. Bit error rate testing (BERT) is supported on each of the T1 links. The BERT testing is done only over a framed T1 signal and can be run only on one port at a time.
The multichannel DS1/PRI port adapter does not support the aggregation of multiple T1s (called inverse muxing or bonding) for higher bandwidth data rates. The multichannel DS1/PRI port adapter supports Cisco HDLC, Frame Relay, PPP, and Switched Multi megabit Data Service Data Exchange Interface (DXI) encapsulations over each T1 link. For SMDS only, DXI is sent on the T1 line, so it needs to connect to an SMDS switch that has direct DXI input.
The multichannel DS1/PRI port adapter has the following features and physical characteristics:
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Note External DSX-1 channels do not provide CSU functionality and must connect to an external CSU for long-haul applications. |
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Note The Catalyst RSM/ , Catalyst 6000 family FlexWAN module, and VIP4 support online insertion and removal (OIR), but individual port adapters do not. To replace the port adapters, you must first remove the Catalyst RSM/, Catalyst 6000 family FlexWAN module, or VIP4 from the chassis and then replace port adapters as required. OIR is supported for port adapters in the Cisco 7200 series and Cisco uBR7200 series routers. |
The DS1/PRI line interface unit (LIU) meets the following specifications for input jitter tolerance, pulse shape/amplitude (T1 and DSX1), line termination, and jitter transfer (see Table 1-1):
| DS1/PRI Channel Number | Data Rate |
|---|---|
0 to 23 | n x 56 kbps up to full T1 (1.344 Mbps) |
| 1Or any mixture of n x 56 and m x 64, where n + m < 24 |
The multichannel DS1/PRI port adapter's DS1/PRI ports receive and transmit at the T1 and DSX-1 level while driving and receiving from a 100 ohm shielded twisted-pair cable. This port adapter connects directly to any equipment that has T1 or DSX-1 level input/output. The DS1/PRI front end meets the following specifications:
T1 versions of the multichannel DS1/PRI port adapter support all DSX-1 specifications, plus the following features:
Table 1-1 provides the T1 channel data rates for the multichannel DS1/PRI port adapter.
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Note Up to 128 interfaces can be configured per multichannel DS1/PRI port adapter. For example, if you have an eight-port multichannel DS1/PRI port adapter with 24 channels per port, 24 x 8 = 192, which is greater than 128, and therefore is not allowed. |
The multichannel DS1/PRI port adapter contains the ENABLED LED, standard on all port adapters, and one status LED for each port. (The LEDs are shown in Figure 1-4, Figure 1-5, and Figure 1-6.)
After system initialization, the ENABLED LED goes on, indicating that the multichannel DS1/PRI port adapter has been enabled for operation. The console screen also displays a message as the system discovers each interface during its reinitialization.
The following conditions must be met before the multichannel DS1/PRI port adapter is enabled:
If any of these conditions is not met, or if the initialization fails for other reasons, the enabled LED does not go on.
Table 1-2 lists various system states and functions that are reflected by the front-panel status LEDs on the multichannel DS1/PRI port adapter during the CPU boot process and microcode download.
| LED Color | State | Description |
|---|---|---|
Yellow | On | RAM test has started. |
Green | On (flashes once) | RAM test has completed. |
Yellow | On | Waiting for download. |
Green | On, then goes off | Download has started. |
Green | On (flashes once, then goes off) | Download has completed. |
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Note After the multichannel DS1/PRI port adapter microcode is booted, the microcode takes over control of the LEDs. |
During the system bootup process and microcode download, if an error occurs, the port status LEDs flash yellow a number of times, pause, and then repeat the flashes. Count the number of flashes to determine the error. Table 1-3 lists the LED error indications that might appear.
| Number of Yellow Flashes | Description |
|---|---|
1 | Memory tests failed. |
2 | PLX mailbox test failed. |
3 | Incomplete data on download. |
4 | Checksum error on download. |
5 | Invalid command (flashing does not repeat, but processing continues). |
6 | Unexpected return from downloaded operational code. |
7 | Processor exception has occurred. |
In all of the preceding error modes, the CPU continually loops and the system does not proceed to the microcode download.
After the system successfully completes the CPU boot process and microcode download, the front-panel port status LEDs on the multichannel DS1/PRI port adapter show the various system states and functions. (See Table 1-4.)
| LED Color | State | Description |
|---|---|---|
Green | On | Port adapter is receiving good signal. |
Yellow | On | Port adapter is in loopback mode. |
None | Off | Not receiving good signal. Not in loopback mode. |
The DS1/PRI interface receptacles on the multichannel DS1/PRI port adapter are RJ-48C for T1 (100 ohm). You can use all interface receptacles simultaneously.
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Note After you properly connect a port to a line, it takes approximately 30 seconds for Cisco IOS to report that the line is up. |
Each connection supports T1 (100 ohm) interfaces that meet T1.403 and ACCUNET TR62411 standards. The RJ-48C connection does not require an external transceiver. The DS1/PRI ports are T1 interfaces that use UTP 100 ohm shielded twisted-pair cables. Figure 1-7 shows the multichannel DS1/PRI port adapter interface cable and connectors.
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Note To meet VCCI Class II EMI requirements, you must use shielded twisted-pair (STP) cables. |
Table 1-5 lists the signal pinouts and descriptions for the RJ-48C connector.
| Pin | Signal1 |
|---|---|
1 | Rx ring |
2 | Rx tip |
3 | NC |
4 | Tx ring |
5 | Tx tip |
6 | NC |
7 | NC |
8 | NC |
| 1Tx = transmit. Rx = receive. NC = no connect. |
This section discusses port adapter slot locations on the supported platforms. The illustrations that follow summarize slot location conventions on each platform.
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Note The Catalyst RSM/ does not support the PA-MC-2T1 multichannel DS1/PRI port adapter. |
The Catalyst RSM/ can be installed in any slot except the top slots, which contain the supervisor engines. The Catalyst RSM/ in a Catalyst 5000 family switch does not use interface processor slot numbering; therefore, slots are not numbered in Figure 1-8. The multichannel DS1/PRI port adapter can be installed into either port adapter slot 0 or slot 1 on a Catalyst RSM/. Figure 1-8 shows a Catalyst RSM/ with two port adapters installed.
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Note The Catalyst 5500 switch has 13 slots. Slot 1 is reserved for the supervisor engine. If a redundant supervisor engine is used, it would go in slot 2; otherwise, slot 2 can be used for other modules. Slot 13 is a dedicated slot, reserved for the ATM switch processor (ASP) module. Refer to the Catalyst 5000 Series Route Switch Module Installation and Configuration Note for any additional slot restrictions for the Catalyst RSM/. |
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Note The Catalyst 6000 family FlexWAN module supports the PA-MC-8T1 multichannel DS1/PRI port adapter only. |
The Catalyst 6000 family FlexWAN module can be installed in any slot except slot 1, which is reserved for the supervisor engine. The PA-8T-232 can be installed into either port adapter bay 0 or bay 1 on a FlexWAN module. Figure 1-9 shows a FlexWAN module with two blank port adapters installed.
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Note Slot 1 is reserved for the supervisor engine. If a redundant supervisor engine is used, it would go in slot 2; otherwise, slot 2 can be used for other modules. |
Figure 1-10 shows a Cisco 7206 router with port adapters installed. In the Cisco 7206 series router, port adapter slot 1 is in the lower left position, and port adapter slot 6 is in the upper right position. (The Cisco 7202 and Cisco 7204 routers are not shown; however, the multichannel DS1/PRI port adapter can be installed in any available port adapter slot.)
Figure 1-11 shows the slot numbering of port adapters in a Cisco uBR7246 router. The port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 router and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet port on the I/O controller—if present.)
Figure 1-12 shows a partial view of a VIP motherboard with installed port adapters. With the motherboard oriented as shown in Figure 1-12, the left port adapter is in port adapter slot 0, and the right port adapter is in port adapter slot 1. The slot numbering is the same for the Catalyst RSM/. The slots are always numbered 0 and 1.
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Note In the Cisco 7000, Cisco 7507, and Cisco 7513 chassis, the VIP motherboard is installed vertically. In the Cisco 7010 and Cisco 7505 chassis, the VIP motherboard is installed horizontally. |
Interface processor slots are numbered as shown in Figure 1-13.
This section describes how to identify interface addresses for the multichannel DS1/PRI port adapter in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the multichannel DS1/PRI port adapter installed in a router maintain the same address regardless of whether other port adapters are installed or removed. However, when you move a port adapter to a different slot, the first number in the interface address changes to reflect the new port adapter slot number.
Interfaces on a multichannel DS1/PRI port adapter installed in a maintain the same address regardless of whether other interface processors are installed or removed. However, when you move a to a different slot, the interface processor slot number changes to reflect the new interface processor slot.
Table 1-6 explains how to identify interface addresses.
| Platform | Interface Address Format | Numbers | Syntax |
|---|---|---|---|
Catalyst RSM/ in Catalyst 5000 family switches | Port-adapter-slot-number/interface-port-number: | Port adapter slot—always 0 or 1 Interface port1:
Channel group—0 through 23 | 0/1:0 |
Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches | Module-slot-number/port-adapter-bay-number/ | Module slot number—22 through 6 or 9 (depending on the number of slots in the switch) Port adapter bay—always 0 or 1 Interface port—0 through 73 Channel group—0 through 23 | 3/0/0:0 |
Cisco 7200 series routers | Port-adapter-slot-number/interface-port-number: | Port adapter slot—0 through 6 (depends on the number of slots in the router)4 Interface port:
Channel group—0 through 23 | 1/0:0 |
Cisco uBR7223 router | Port-adapter-slot-number/interface-port-number: | Port adapter slot—always 14 Interface port:
Channel group—0 through 23 | 1/0:0 |
Cisco uBR7246 routers | Port-adapter-slot-number/interface-port-number: | Port adapter slot—always 1 or 24 Interface port:
Channel group—0 through 23 | 1/2:0 |
VIP 2 or VIP4 in Cisco 7000 series or Cisco 7500 series routers | Interface-processor-slot-number/port-adapter-slot- | Interface processor slot—0 through 12 (depends on the number of slots in the router) Port adapter slot—always 0 or 1 Interface port:
Channel group—0 through 23 | 3/1/0:0 |
| 1The Catalyst RSM/ does not support the PA-MC-2T1 multichannel DS1/PRI port adapter. 2Slot 1 is reserved for the supervisor engine. If a redundant supervisor engine is used, it must go in slot 2; otherwise, slot 2 can be used for other modules. 3The Catalyst 6000 family FlexWAN module supports the PA-MC-8T1 multichannel DS1/PRI port adapter only. 4Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present). |
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Note The Catalyst RSM/ does not support the PA-MC-2T1 multichannel DS1/PRI port adapter. |
The interface numbering scheme for the multichannel DS1/PRI port adapter's T1 interfaces on a Catalyst RSM/-equipped router is in the form of port adapter/port:channel group.
See Table 1-6 for the interface address format.
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Note The Catalyst 6000 family FlexWAN module supports the PA-MC-8T1 multichannel DS1/PRI port adapters only. |
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Note The FlexWAN module physical port address uses a zero (0) based port address, which differs from the traditional Catalyst 6000 family one (1) based port address. |
This section describes how to identify the interface addresses used for the PA-MC-8T1 on the Catalyst FlexWAN module in Catalyst 6000 family switches. The interface address is composed of a four-part number in the format module-number/port-adapter-bay-number/interface-port-number:channel-group.
See Table 1-6 for the interface address format.
If the FlexWAN module is inserted in module slot 3, then the interface addresses of the PA-MC-8T1 are 3/0/0 through 3/0/7 (module slot 3, port adapter bay 0, and interfaces 0 through 7). If the port adapter was in port adapter bay 1 on the FlexWAN module, these same interface addresses would be numbered 3/1/0 through 3/1/7.
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Note If you remove the FlexWAN module with the PA-MC-8T1 from module slot 3 and install it in module slot 6, the interface addresses become 6/0/0 through 6/0/7. |
This section describes how to identify the interface addresses used for the multichannel DS1/PRI port adapter in Cisco 7200 series routers or Cisco uBR7200 series routers. The interface address is composed of a three-part number in the format port-adapter-slot-number/interface-port-number:
channel-group. See Table 1-6 for the interface address format.
In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right, beginning with port adapter slot 1 and continuing through port adapter slot 2 for the Cisco 7202, slot 4 for the Cisco 7204 and Cisco 7204VXR, and slot 6 for the Cisco 7206 and Cisco 7206VXR. (Port adapter slot 0 is reserved for the optional Fast Ethernet port on the I/O controller—if present.)
For example, the interface addresses of the interfaces on the PA-MC-8T1 port adapter in port adapter slot 1 are 1/0 through 1/7 (port adapter slot 1 and interfaces 0 through 7). If the PA-MC-8T1 port adapter was in port adapter slot 4, these same interfaces would be numbered 4/0 through 4/7 (port adapter slot 4 and interfaces 0 through 7).
In Cisco uBR7200 series routers, port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and Cisco uBR7246VXR and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet port on the I/O controller—if present.) The individual interfaces always begin with 0. The number of additional interfaces depends on the number of interface ports on a port adapter.
For example, the interface addresses of the interfaces on a PA-MC-2T1 port adapter in port adapter slot 2 are 2/0 and 2/1 (port adapter slot 2 and interfaces 0 and 1). If the PA-MC-8T1 port adapter was in port adapter slot 1, these same interfaces would be numbered 1/0 and 1/1 (port adapter slot 1 and interfaces 0 and 1).
This section describes how to identify the interface addresses used for the multichannel DS1/PRI port adapter on a in Cisco 7000 series and Cisco 7500 series routers.
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Note Although the processor slots in the seven-slot Cisco 7000 and Cisco 7507 and the thirteen-slot Cisco 7513 and Cisco 7576 are vertically oriented and those in the five-slot Cisco 7010 and Cisco 7505 are horizontally oriented, all Cisco 7000 series and Cisco 7500 series routers use the same method for slot and port numbering. |
See Table 1-6 for the interface address format. The interface address is composed of a 4-part number in the format slot/port adapter/port:channel group.
On the , the interface processor slot starts with 0. The number of additional interface processor slots depends on the number of slots in the router. The first port adapter slot number is always 0. The second port adapter slot number is always 1. The individual port numbers always begin with 0. The number of additional ports depends on the number of ports on a port adapter.
For example, the serial port on a PA-MC-8T1 port adapter in the first port adapter slot in chassis slot 3 is numbered 3/0/0. If the multichannel DS1/PRI port adapter is in port adapter slot 1, this same port is numbered 3/1/0.
Posted: Wed Sep 6 14:02:07 PDT 2000
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