T1/E1 Controller Commands

           這部分文檔是關於T1/E1控制器配置命令。這些命令取決於你是否配置E1/T1控制器。下表列出了每一種控制器的支持情況。

 

cablelength long     

爲電纜線路距離200米的CSU類型T1接口配置傳輸和接受級別。使用cablelength long 去配置，使用no cablelength long去恢復默認。

            cablelength long {gain26 | gain36} {-15db | -22.5db | -7.5db | 0db}
                    cablelength long

參數描述：

         gain26 | gain36  置接受靈敏度。如果硬件固定了36，則命令不起作用

         -15db | -22.5db | -7.5db | 0db  設置傳輸衰減係數

默認值：

         接受靈敏值在CLI顯示爲26，硬件綁定36

         傳輸衰減值爲0

使用指南：

這個命令僅僅被類型爲CSU（長短距）的T1控制器所支持。如果你啓用cablelength long命令在DSX-1（短距離）接口，這個命令將會被拒絕。

使用show  controller T1命令去確定一個控制器是否爲CSU類型。

這個指令使用於Voice over Frame Relay, Voice over ATM, and Voice over HDLC 在 Cisco MC3810 MFT上

在Cisco MC3810 MFT and DVM 硬件中，接收靈敏固定在36db並且不受cablelength long {gain26 | gain36} 命令的影響。CISCO建議使用gain 36值以至命令入口匹配實際值。

傳輸衰減值最好通過實驗獲得。如果遠端設備接收信號太強，通過使用增加衰減值來減小傳輸級別。

下面的例子通過改變CLI接收靈敏度去匹配硬件實際接收靈敏度，對控制器T1  0接口發送信號進行15db的衰減。

         controller T1 0
                cablelength long gain36 -15db

cablelength short

爲電纜線路距離爲200米或小於200米的DSX-1類型T1接口配置傳輸衰減級別。使用cablelength short 去配置，使用no cablelength short去恢復默認。

         cablelength short {133 | 266 | 399 | 533 | 655}
                 no  cablelength short

默認線纜距離爲133。

使用指南：

這個命令僅僅被類型爲DSX-1（短距離）的T1控制器所支持。如果你啓用cablelength long命令在CSU（長距離）接口上，這個命令將會被拒絕。

使用show controller T1命令去確定一個控制器是否爲CSU類型。

這個指令使用於Voice over Frame Relay，Voice over ATM，and Voice over HDLC在  Cisco MC3810 MFT上

下面的例子是爲電纜距離在134~266英尺長，在T1接口上設置合適傳輸衰減值。

          controller T1 1

                 cablelength short 266

 

channel-group

在T1或E1接口上配置Voice時隙列表，使用channel-group去配置，no channel-group去刪除。

         channel-group channel-no timeslots timeslot-list speed {56 | 64}
                 no channel-group channel-no timeslots timeslot-list speed {56 | 64}

參數介紹：

channel-no   通道組的ID標識號，可用範圍爲0~31

timeslots-list   時隙TS0被包含在通道組，可用的時隙T1（1~24），E1（1~15，17~31）

speed{56|54}  可選項

默認T1/E1爲64kbps

 

clock source

           clock source {line | internal | loop-timed}

參數解釋：

line	The controller recovers external clock from the line and provides the recovered clock to the internal (system) clock generator. The line value is the default clock source for the MFT.
internal	The controller synchronizes itself to the internal (system) clock. The internal value is the default clock source for the DVM.
loop-timed	The T1/E1 controller recovers clock from the Rx (line) and uses it for Tx. This setting decouples the controller clock from the system-wide clock set with the network-clock-select command. The loop-timed clock enables the digital voice module (DVM) to connect to a PBX and to connect the Multiflex Trunk (MFT) to a central office when both the PBX and the central office function as DCE clock sources. This situation assumes that the PBX also takes the clocking from the central office thereby synchronizing the clocks on the DVM and the MFT.

默認（line）外部時鐘源在E1 0/T1 0

         （internal）內部時鐘源在e1 1/T1 1

 

framing (E1/T1 controller)

Use the framing controller configuration command to select the frame type for the E1 or T1 data line.

For T1 lines:

framing {sf | esf}

For E1 lines:

framing {crc4 | no-crc4} [australia]

Syntax Description

sf	Super frame is the T1 frame type.
esf	Extended super frame is the T1 frame type.
crc4	CRC4 frame is the E1 frame type.
no-crc4	CRC4 frame is not the E1 frame type.
australia	(Optional) E1 frame type used in Australia.

 

Defaults

Super frame is the default on a T1 line.

CRC4 frame is the default on an E1 line.

 

linecode

Use the linecode controller command to select the line-code type for a T1 or E1 line.Use the no form of the command to restore the default.

For T1 lines:

linecode {ami | b8zs}

no linecode {ami | b8zs}

For E1 lines:

linecode {ami | hdb3}

no linecode {ami | hdb3}

Syntax Description

ami	Alternate mark inversion (AMI) line-code type. Valid for both T1 and E1 controllers.
b8zs	B8ZS line-cole type. Valid for T1 controller only.
hdb3	High-density bipolar 3 (HDB3) line-code type. Valid for E1 controller only.

 

Defaults

HDB3 line code is the default for E1 lines.

AMI line code is the default for T1 lines.

 

loop-detect

To enable loop detection for T1, use the loop-detect controller configuration command. Use the no form of the command to cancel the loop detect operation.

loop-detect
no loop-detect

Syntax Description

This command has no arguments or keywords.

Defaults

Loop detection is disabled.

 

loopback

Use the loopback controller configuration command to put the T1 or E1 line into loopback mode. Use the no form of this command to disable loopback mode.

For E1:

loopback {local | line | payload}
no loopback {local | line | payload}

For T1:

loopback {local | remote | line | payload}
no loopback {local | remote | line | payload}

Syntax Description

local	The controller loops the internal signal back to the internal bus in the Cisco MC3810.
line	The controller loops the external line signal back toward the network without reframing the DS1 signal.
payload	The controller loops the external line signal back toward the network and reframes the DS1 signal.
remote	For T1 only. The T1 controller sends the inband loop-up code to the remote device, which is assumed to have CSU functionality. The remote device detects the code and loops the line back to the Cisco MC3810. If the Cisco MC3810 detects its own code, the loopback is successful. If the Cisco MC3810 does not detect its own code within 10 seconds, the loopback is not successful.

 

Defaults

Local is the default for T1 and E1 lines.

 

mode

To set the mode of the T1/E1 controller and enter specific configuration commands for each mode type, use the mode controller configuration command. Use the no form of this command to restore the default mode of the controller.

mode {atm | cas | ccs cross-connect | ccs frame-forwarding }
no mode {atm | cas | ccs cross-connect | ccs frame-forwarding }

Syntax Description

atm	Sets the controller into ATM mode and creates an ATM interface (ATM 0) on the Cisco MC3810. When ATM mode is enabled, no channel groups, voice groups, PRI groups, or TDM groups are possible, because ATM occupies all the DS0s on the T1/E1 trunk. When you set the controller to ATM mode, the controller framing is automatically set to ESF for T1 or CRC4 for E1. The linecode is automatically set to B8ZS for T1 or HDBC for E1. When you remove ATM mode by entering the no mode atm command, ATM interface 0 is deleted. ATM mode is supported on controller 0 only (T1 0 or E1 0).
cas	Sets the controller into channel associated signaling (CAS) mode and enables the voice-group command, which allows you to create voice groups. CAS mode is supported on controllers 0 and 1.
ccs cross-connect	Sets the controller into transparent Common Channel Signaling (CCS) mode and enables the voice-group command, which allows you to create voice groups. HDLC frames from a CCS D-channel timeslot are cross-connected to a TDM group or to a serial port. Transparent CCS mode is supported on controller 1 only (T1 1 or E1 1).
ccs frame-forwarding	Sets the controller into transparent CCS mode and enables the voice-group command, which allows you to create voice groups. It creates interface serial 1:x, where x is 23 on controller T1 1 and x is 15 on controller E1 1. HDLC frames from a CCS D channel are forwarded to a preconfigured Frame Relay DLCI or to an ATM PVC. Transparent CCS mode is supported on controller 1 only (T1 1 or E1 1) .

 

Defaults

No mode is configured.

 

Usage Guidelines

This command applies to the Cisco MC3810 with the digital voice module (DVM) installed.

If no mode is configured, only channel groups, PRI groups, and TDM groups (in data mode) can be configured. Channel groups and TDM groups are created using the channel group and tdm-group commands, respectively.

On the Cisco MC3810, some DS0s are used exclusively for different signaling modes. DS0 channels have the following limitations when mixing different applications (such as voice and data) on the same network trunk:

•On E1 controllers, DS0 16 is used exclusively for either CAS or transparent CCS, depending on which mode is configured. DS0 16 is identified as serial 1:15 in transparent CCS.

•On T1 controllers, DS0 24 is used exclusively for transparent CCS, and is identified as serial 1:23.

The no form of the command is not accepted if there are voice groups configured on the controller.

 

pri-group

To specify ISDN Primary Rate Interface (PRI) on a channelized T1 or E1 controller, use the pri-group controller configuration command. Use the no form of this command to remove the ISDN-PRI configuration.

pri-group [timeslots range ]
no pri-group

Syntax Description

timeslots range

(Optional) Specifies a single range of values from 1 to 23 for channelized T1 and from 1 to 31 for channelized E1.

 

Defaults

No ISDN-PRI configuration is configured.

Usage Guidelines

This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.

Before you enter the pri-group command, you must specify an ISDN-PRI switch type and an E1 or T1 controller. Only one pri group can be configured on a controller.

Examples

The following example configures ISDN-PRI on all timeslots of controller T1 1 on a Cisco MC3810:

isdn switch-type primary-qsig-master

controller T1 1

 pri-group timeslots 1-23

tdm-group 
To configure a list of timeslots for creating clear channel groups (pass-through) for Time Division Multiplexing (TDM) cross-connect, use the tdm-group controller configuration command. Use the no form of this command to delete a clear channel group. 
tdm-group tdm-group-no timeslots timeslot-list [type {e&m | fxs [loop-start | ground-start] | fxo [loop-start | ground-start] | fxs-melcas | fxo-melcas | e&m-melcas} ] 
no tdm-group tdm-group-no 
Syntax Description
tdm-group-no 
TDM group number. The valid range is 0 to 31. 
Note For any of the timeslots within the timeslot range provided for the TDM group, use timeslot -1 as the TDM group number. 
timeslot-list 
Timeslots (DS0s) to include in this TDM group. The valid timeslots are: 1 to 24 for T1; 1 to 15 and 17 to 31 for E1. 
type 
(Valid only when the mode cas command is enabled.) Specifies the voice signaling type of the voice port. If configuring a TDM group for data traffic only, do not specify the type option. 
Choose from one of the following options: 
 
•e&m—for E&M signaling 
•fxo—for Foreign Exchange Office signaling (optionally, you can also specify loop-start or ground-start) 
•fxs—for Foreign Exchange Station signaling (optionally, you can also specify loop-start or ground-start) 
•e&m-melcas—for E&M Mercury Exchange Limited (MEL) Channel Associated Signaling 
•fxs-melcas— for Foreign Exchange Station Mercury Exchange Limited (MEL) Channel Associated Signaling 
•fxo-melcas—for Foreign Exchange Office Mercury Exchange Limited (MEL) Channel Associated Signaling 
The melcas options apply only to E1 lines and are used primarily in the United Kingdom. 

Defaults 
No TDM group is configured. 
Usage Guidelines 
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810. 
Note   Channel groups, voice groups, and TDM groups all use group numbers. All group numbers configured for channel groups, voice groups and TDM groups must be unique on the local Cisco MC3810 concentrator. For example, you cannot use the same group number for both a channel group and a TDM group. 
Examples 
The following example configures TDM group number 20, containing DS0s 2, 5, 7, 9-12, and 21, on controller T1 1 to support FXS ground-start signaling: 
controller T1 1
 mode cas
 tdm-group 20 timeslots 2,5,7,9-12,21 type fxs ground-start
 
voice-group 
To configure a list of voice ports for Channel Associated Signaling (CAS) or transparent Common Channel Signaling (CCS) on the T1/E1 controller, use the voice-group controller configuration command. Use the no form of this command to delete voice groups. 
voice-group voice-group-no timeslots timeslot-list type {e&m-immediate | e&m-delay | e&m-wink | e&m-melcas | fxs-ground-start | fxs-loop-start | fxs-melcas | fxo-ground-start | fxo-loop-start | fxo-melcas | ext-sig-master | ext-sig-slave} 
no voice-group voice-group-no timeslots timeslot-list 
Syntax Description
voice-group-no 
Number to identify the voice group. The valid range is 0 to 23. 
timeslot-list 
Timeslots (DS0s) to include in this voice group. The valid timeslots are: 1 to 24 for T1; 1 to 15 and 17 to 31 for E1. 
type 
Signaling type: 
•e&m-immediate—for E&M immediate 
•e&m-delay—for E&M delay 
•e&m-wink—for E&M wink 
•e&m-melcas—for E&M Mercury Exchange Limited (MEL) Channel Associated Signaling 
•fxs-ground-start—for Foreign Exchange Station ground-start 
•fxs-loop-start—for Foreign Exchange Station loop-start 
•fxs-melcas— for Foreign Exchange Station Mercury Exchange Limited (MEL) Channel Associated Signaling 
•fxo-ground-start—for Foreign Exchange Office ground-start 
•fxo-loop-start—for Foreign Exchange Office loop-start 
•fxo-melcas—for Foreign Exchange Office Mercury Exchange Limited (MEL) Channel Associated Signaling 
•ext-sig-master —configures this Cisco MC3810 to establish permanent calls on all voice ports in this voice group 
•ext-sig-slave—configures this Cisco MC3810 to wait for call setup to be received 
The melcas options are used primarily in the United Kingdom. 

Defaults 
No voice group is configured. 
Command Mode 
Controller configuration 
Command History
Release 
Modification 
11.3 MA 
This command was first introduced. 
12.0(2) T 
The ext-sig-master and ext-sig-slave commands were added. 

Usage Guidelines 
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810. 
This command is only available if the mode cas or mode ccs command is enabled. 
Note   Channel groups, voice groups, and TDM groups all use group numbers. All group numbers configured for channel groups, voice groups and TDM groups must be unique on the local Cisco MC3810 concentrator. For example, you cannot use the same group number for both a channel group and a TDM group. 
Examples 
The following example configures voice group number 10, containing DS0s 1 through 12, on controller T1 0 to support E&M immediate-start signaling 
controller t1 0
 mode cas
 voice-group 10 timeslots 1-12 e&m-immediate