

The features supported by the single-port serial module on Cisco 800M Series ISR is given as follows: Serial module in slot 0 and serial module in slot 1.3G module in slot 0 and serial module in slot 1.Serial module in slot 0 and 3G module in slot 1.The Cisco 800M Series ISR has 2 WAN slots that can host single-port serial module or multi-mode 3G module and supports the following combinations. The Cisco 800M Series ISR supports both synchronous and asynchronous modes of communication. The Cisco 800M Series Integrated Services Router (ISR) provides serial WAN connectivity to remote sites using Cisco High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), or Frame Relay encapsulation through the pluggable, serial WAN interface module.

Information About Configuring Serial Interfaces.This chapter describes configuring the serial interface for Cisco 800M Series ISRs in the following sections:
