To customize E1 R2 signaling parameters for a particular E1 channel group on a channelized E1 line, use the cas-custom controller configuration command. Use the no form of this command to disable the signaling customization
cas-custom channel
no cas-custom channel
channel Specifies a single channel group number, which can be between 0 and 30. This channel group number must match the channel number specified in the cas-groupcommand.
No customized signaling parameters are set. If you do not specify a country name using the country name command, which is described in Table 3, ITU is the selected default signal.
Controller configuration
| Release | Modification | 11.2 P | This command was introduced. |
|---|
The customization parameters set by the cas-custom channelcommand are applied to the same channel group number used in the cas-groupchanneltimeslots rangetypesignal command. These channel group numbers must match. Otherwise, the customized features specified by the cas-custom command will not be applied to the cas-group command's configuration. The signaling customization will not take effect. See the examples.
However, you will not need to configure or set more than one channel group number per E1 line in most cases. Though rarely used, it is possible to split a single E1 (timeslots 1 to 31) into two groups (for example, 1 to 15 on group 1 and timeslots 17 to 31 in group 2).
We strongly recommends that you use the use-defaults option when specifying a particular country type. See the country name command in Table 3. This additional keyword ensures that all the local country settings are correctly enabled. For example, issue the country greece use-defaults command. If the use-defaults option is not specified, generic ITU will be the default setting for all countries. You can localize your R2 configuration for a specific country. Do not forget to include the use-defaults option as described in Table 3. For example, use the country argentina use-defaults command for an R2 scenario in Argentina.
You can configure the system to deviate from a country's default settings. To do this, choose from the following list of commands described in Table 3: ani-digits minnumbermax number, answer-signal{group-a | group-b }number, caller-digitsnumber, category number, dnis-digits minnumbermax number, invert-abcd, kanumber, kd number, metering, nc-congestion, and unused-abcdvalue. To return a country back to its country specific default settings, issue the country nameuse-defaults command. To return a country back to the ITU standard, issue the default countrynameuse-defaults command. See Table 3 and the examples.
Only integrated MICA modems support E1 R2 signaling on access servers.
Table 3 shows a list of command options in cas-custom mode , which is used to customize R2 signaling settings. Some switches require you to fine tune your R2 settings. Do not tamper with these commands unless you understand exactly how your switch will be affected.
| Command | Purpose |
| ani-digits minnumbermax number | Requested number of ANI digits for each call. All calls that do not match the minimum and maximum settings that you specify will be dropped. The minimum number of collected digits is set by min number. Replace the number variable with a value between 0 and 64. The maximum number of collected digits is set by max number. Replace the number variable with a value between 5 and 64. By default, ANI digits are not collected, which is the ITU standard. |
| answer-signal{group-a | group-b }number | Answer signal to be used. You can specify the group A signal or the group B signal. The signal numbercan be 1 to 15. Defaults is group-b 6, which is the ITU default. |
| caller-digitsnumber | Specifies the number of digits the access server needs to collect before it requests ANI or CallerID information. The digits can be from 1 to 10. Default is 1, which is the ITU default. |
| categorynumber | Specifies the category type of the incoming call, which is mapped to a group signal number. Signal numbers from 1 to 15 are available. Default is 1, which is the ITU default. |
| countrynameuse-defaults | Specifies the local country, regional, and some corporation settings for R2 signaling. Replace the name variable with one of the following supported country names. We recommend that you include the use-defaults option, which enables the default settings for a specific country. Defaults country setting is ITU.
|
indonesia use-defaults
|
|
paraguay use-defaults
|
|
| default | Sets a command to its default setting. |
| dnis-digits minnumbermax number | Requested number of DNIS digits for each call. All calls that do not match the minimum and maximum settings that you specify will be dropped. The minimum number of collected digits is set by min number. Replace the number variable with a value between 0 and 64. The maximum number of collected digits is set by max number. Replace the number variable with a value between 5 and 64. By default, DNIS digits are not collected, which is the ITU standard. |
| exit | Takes you out of cas custom mode. |
| invert-abcd | Inverts the ABCD bits before tx and after rx. This feature is disabled by default, which is the ITU default. |
| kanumber | Specifies the KA signal code. You can choose 1 to 15. Default is 0, which is the ITU default. |
| kdnumber | Specifies the KD signal code. You can choose 1 to 15. Default is 0, which is the ITU default. |
| metering | Specifies sending a metering pulse when the access server is making an outgoing call. Metering is turned off by default, which is the ITU default. |
| nc-congestion | Specifies the noncompelled congestion signal. This signal is sent to the central office when the access server is congested and cannot accept the call. The default is B4, which is the ITU default. |
| no | Negates a command or sets its defaults. |
| request-category | DNIS digits to be collected before requesting category. A category specifies different priority levels for different calls within R2, such as data calls verses voice calls. This information is primarily used for the switches that forward the calls to the NAS. For example, India needs the category requested after the first DNIS digit. |
| unused-abcdvalue | Specifies unused ABCD bit values, which can have a 0 or 1 bit value. This feature is disabled by default, which is the ITU default. |
The following example displays the available signaling parameters after you enter cas-custom mode. Notice that the same channel group 1 is specified in the cas-groupcommand and the cas-custom command.
router# configure terminal Enter configuration commands, one per line. End with CNTL/Z router(config)# controller e1 1 router(config-controller) cas-group 1 timeslots 1-31 type r2-digital r2-compelled router(config-controller) cas-custom 1 router(config-ctrl-cas)# ? CAS custom commands: ani-digits Expected number of ANI digits answer-signal Answer signal to be used caller-digits Digits to be collected before requesting CallerID category Category signal country Country Name default Set a command to its defaults dnis-digits Expected number of DNIS digits exit Exit from cas custom mode invert-abcd invert the ABCD bits before tx and after rx ka KA Signal kd KD Signal metering R2 network is sending metering signal nc-congestion Non Compelled Congestion signal no Negate a command or set its defaults request-category DNIS digits to be collected before requesting category unused-abcd Unused ABCD bit values
You can localize your R2 configuration for a specific country. Do not forget to include the use-defaults option as described in Table 3. For example, use the country argentina use-defaults command for a R2 scenario in Argentina.
router(config-ctrl-cas)#country ? argentina Argentina australia Australia brazil Brazil china China columbia Columbia costarica Costa Rica easteurope East Europe ecuador-itu Ecuador ITU ecuador-lme Ecuador LME greece Greece guatemala Guatemala hongkong-china Hong Kong (China variant) indonesia Indonesia israel Israel itu ITU korea Korea malaysia Malaysia newzealand New Zealand paraguay Paraguay peru Peru philippines Philippines saudiarabia Saudi Arabia singapore Singapore southafrica-panaftel South Africa Panaftel telmex Telmex telnor Telnor thailand Thailand uruguay Uruguay venezuela Venezuela vietnam Vietnam router(config-ctrl-cas)# country argentina ? use-defaults Use Country defaults <cr> router(config-ctrl-cas)# country argentina use-defaults
The following example customizes the signaling for channel group 1. The configuration collects 3 digits before it requests ANI information for analog calls received on a Cisco AS5300 in Argentina.
router(config-controller)# cas-custom 1 router(config-ctrl-cas)# country argentina use-defaults router(config-ctrl-cas)# caller-digits 3 router(config-controller)# ^z router(config)#
Because cas-custom mode gives you the flexibility to customize R2 parameters, the margin for user error increases. Therefore, the software enables you to return a country back to its default R2 settings using the use-defaults option. The following example begins by bringing up Argentina's default settings, changing a few customization parameters, then returning the Argentina R2 setting back to its original state.
router(config-ctrl-cas)# country argentina use-defaults router(config-ctrl-cas)# caller-digits 3 router(config-ctrl-cas)# unused-abcd 1 router(config-ctrl-cas)# metering router(config-ctrl-cas)# country argentina use-defaults
| Command | Description |
|---|---|
| cas-group (controller e1) | Configures CAS on an E1 controller. |
Printed for apswan@ctr.ap.nic.in on Wed Mar 5 22:32:57 PST 2003
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