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[Home](./index.md) &gt; [sip.js](./sip.js.md) &gt; [SessionDescriptionHandler](./sip.js.sessiondescriptionhandler.md)

## SessionDescriptionHandler interface

Delegate for [Session](./sip.js.session.md) offer/answer exchange.

<b>Signature:</b>

```typescript
export interface SessionDescriptionHandler 
```

## Methods

|  Method | Description |
|  --- | --- |
|  [close()](./sip.js.sessiondescriptionhandler.close.md) | Destructor. |
|  [getDescription(options, modifiers)](./sip.js.sessiondescriptionhandler.getdescription.md) | Gets the local description from the underlying media implementation. |
|  [hasDescription(contentType)](./sip.js.sessiondescriptionhandler.hasdescription.md) | Returns true if the Session Description Handler can handle the Content-Type described by a SIP message. |
|  [holdModifier(sessionDescription)](./sip.js.sessiondescriptionhandler.holdmodifier.md) | The modifier that should be used when the session would like to place the call on hold. |
|  [rollbackDescription()](./sip.js.sessiondescriptionhandler.rollbackdescription.md) | Rolls back the current local/remote offer to the prior stable state. |
|  [sendDtmf(tones, options)](./sip.js.sessiondescriptionhandler.senddtmf.md) | Send DTMF via RTP (RFC 4733). Returns true if DTMF send is successful, false otherwise. |
|  [setDescription(sdp, options, modifiers)](./sip.js.sessiondescriptionhandler.setdescription.md) | Sets the remote description to the underlying media implementation. |