# POTS Peer Configuration

The POTS Peer Configuration dialog box provides POTS dial-peer configuration information on voice ports. The dialog box applies to the voice ports associated to a dial-peer.

## Navigation

Do one of the following:

> Right-click on a voice port, then select Configure > Dial-Peer Configuration > POTS Peer Configuration from the popup menu.

> Right-click on a voice port, then select Configure > Dial-Peer Configuration > General Peer Configuration from the popup menu. The General Peer Configuration dialog box appears. Click Details, then select POTS Peer Configuration.

> Right-click on an 8FXS or 16FXS port, then select Configure from the popup menu. The VoicePort list dialog box appears. Click Details, then select Dial-Peer Configuration > POTS Peer Configuration.

> Right-click on the Access Gateway Module, then select Voice Configuration > Dial-Peer Configuration > POTS Peer Configuration from the popup menu..

The following information appears:

> Dial Peer-Tag (dialCtlPeerCfgId)

> Session-Target (cvVoicePeerCfgSessionTarget)

> Dial Digit Prefix (cvVoicePeerCfgDialDigitsPrefix)

> DID Call Enable (cvVoicePeerCfgDIDCallEnable)

> CAS Group (cvVoicePeerCfgCasGroup)

> Register E.164 Number (cvVoicePeerCfgRegisterE164)

> Forward Digits (cvVoicePeerCfgForwardDigits)

### Dial Peer-Tag (dialCtlPeerCfgId)

The identification for a dial peer. There can be several entries for one peer, defining different ways to reach the peer. So there can be several entries in the table with the same value of dialCtlPeerCfgId. Multiple entries for one peer may be used to support multilink as well as backup lines.

A single peer will be identified by a unique value of this object.

### Session-Target (cvVoicePeerCfgSessionTarget)

The session target of the peer. The session target has the syntax used by the IETF service location protocol.

The syntax is: mapping-type:type-specific-syntax

where mapping-type specifies a scheme for mapping the matching dial string to a session target.

The valid mapping type definition for the peer is as follows: loopback

Syntax: loopback:where

The where string is defined as follows:

- compressed means loopback is performed on compressed voice as close to the CODEC which processes the data.
- uncompressed means loopback is performed on the PCM or analog voice as close to the telephony endpoint.

There are two loopback cases:

- Local loopback case:
  - uncompressed means the PCM voice coming into the DSP is turned around and sent back out, allowing testing of the transmit to receive paths in the telephony endpoint.
  - compressed means the compressed voice coming out of the codec is turned around on the DSP module and fed back into the decompressor through the jitter buffer. In addition to the telephony endpoint, this tests both the encode and decode paths without involving data paths or packet handling on the host router.
- Remote loopback case:
  - compressed means RTP packets received from the network are decapsulated and passed to the DSP board. Instead of feeding these into the codec for decompression, they are immediately sent back to the session application as if they originated locally and were compressed.
  - uncompressed means in addition to the above, the voice samples are sent all the way through the codec and then turned around instead of being sent to the telephony endpoint.

### Dial Digit Prefix (cvVoicePeerCfgDialDigitsPrefix)

The prefix of the dial digits for the peer. The dial digits prefix is sent to telephony interface before the real phone number when the system places the outgoing call to the voice encapsulation peer over telephony interface.

### DID Call Enable (cvVoicePeerCfgDIDCallEnable)

Enables or disables the DID call treatment for incoming DNIS digits.

Values are:

true | The incoming DNIS digits as if the digits are received from DID trunk.
false | Disable DID call treatment for incoming DNIS digits.

### CAS Group (cvVoicePeerCfgCasGroup)

The CAS group number of a CAS capable T1 or E1 that is in the dialCtlPeerCfgLowerIf of RFC2128. It is set to a valid CAS group number if the dialCtlPeerCfgLowerIf contains a valid ifIndex for a CAS capable T1 or E1. It must be set to -1 before the value of dialCtlPeerCfgLowerIf of RFC2128 is changed.

Value range is 0 to 23 for T1 and 0 to 30 for E1. -1 means the Cas group is disabled.

### Register E.164 Number (cvVoicePeerCfgRegisterE164)

Specifies whether the E.164 number specified in the dialCtlPeerCfgOriginateAddress field of the associated dialCtlPeerCfgTable entry must be registered with the router gatekeeper.

### Forward Digits (cvVoicePeerCfgForwardDigits)

The number of dialed digits, to be forwarded to the remote destination, in the setup message.

Values are:

0 to 32 | Number of right justified digits to forward.
-1 | 0
-2 | Forward extra digits.
-3 | Forward all digits.