Auto-dialer can rout your calls to calling card gateway automatically
When users make a call through prepaid calling card, they usually have to dial in following steps:

Access number, which is the ID of carrier or service
Card number, which is the ID of the card
Pin, which is the key/password for the card
Then dial the national or international tel
Number that he or she wants.

Auto-dialers can do all the steps for you. once you program the access number, card number and pin into auto-dialer at the first time you use it. Then every time you want to make a long-distant call, all you need is just dial directly just like common ID. Auto-dialer will dial for you the access number, card number and pin before tel number dialed by you.

That is very convenient for prepaid calling card users.
Also it is a good way for a calling card provider to hold their users.

Descriptions:
Stackable design, work either with line or power adapter, auto-redial, auto rout calls to calling card gateway, easy to setup, compatible with all types of calling cards. Supports local voice prompted setting and remote configuration for maintenance and programming, line-powered. Our factory can develop special design according to customers.

Functions:
Work either with line-powered or with power adapter
More dialers can be stacked top-by-top like one device
Auto-redial when the gateway no is busy/engaged
Auto dial next gateway no. If first gateway is still busy
Mechanical bypass switch.